TY  - CONF
AU  - Rajičić, Bratislav
AU  - Maslarević, Aleksandar
AU  - Bakić, Gordana
AU  - Maksimović, Vesna
AU  - Đukić, Miloš
PY  - 2024
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/7775
AB  - Failures in industrial plants, which operate under extreme conditions, could occur after a short time of exploitation. Erosion wear of materials is caused by the relative movement of solid particles and the surfaces of components. Such erosive wear can lead to the failure of industrial components in a very short time and/or a sharp decline in the structural integrity of industrial equipment. For example, the wear of the ash disposal system in a coal-burning thermal power plant, due to impact of ash particles with a high content of mineral residues, is a very common case of failure and outages in the operation of such industrial systems.
Two high chromium cast irons (HCCI) were tested to determine the erosion wear. These alloys contain 15% Cr and 25% Cr, and it was tested in as-cast and after heat treatment (annealing). A specially designed installation was used for the gas blast sand erosion test. Type of erodent was foundry quartz sand. Erosion tests were done with high erodent particle velocity (90 m/s) and high erodent feed rate (3000 g/min). This conditions represents those similar to extreme wear conditions of some components of thermal power plants using pulverized high mineral content coals.
Microstructural characterization was done at samples before and after erosion tests, Fig. 1. The main results indicate that matrix plastic deformation and distribution of carbide phase have a significant contribution to erosion resistance of HCCI alloys in such conditions.
PB  - Vinča Institute of Nuclear Sciences - National Insittute of the Republic of Serbia, University of Belgrade
PB  - Serbian Society for Innovative Materials in Extreme Conditions (SIM-EXTREME)
C3  - Book of Abstracts - 2nd International Conference on Innovative Materials in Extreme COnditions
T1  - Erosion wear of HCCI alloys
UR  - https://hdl.handle.net/21.15107/rcub_machinery_7775
ER  - 

@conference{
author = "Rajičić, Bratislav and Maslarević, Aleksandar and Bakić, Gordana and Maksimović, Vesna and Đukić, Miloš",
year = "2024",
abstract = "Failures in industrial plants, which operate under extreme conditions, could occur after a short time of exploitation. Erosion wear of materials is caused by the relative movement of solid particles and the surfaces of components. Such erosive wear can lead to the failure of industrial components in a very short time and/or a sharp decline in the structural integrity of industrial equipment. For example, the wear of the ash disposal system in a coal-burning thermal power plant, due to impact of ash particles with a high content of mineral residues, is a very common case of failure and outages in the operation of such industrial systems.
Two high chromium cast irons (HCCI) were tested to determine the erosion wear. These alloys contain 15% Cr and 25% Cr, and it was tested in as-cast and after heat treatment (annealing). A specially designed installation was used for the gas blast sand erosion test. Type of erodent was foundry quartz sand. Erosion tests were done with high erodent particle velocity (90 m/s) and high erodent feed rate (3000 g/min). This conditions represents those similar to extreme wear conditions of some components of thermal power plants using pulverized high mineral content coals.
Microstructural characterization was done at samples before and after erosion tests, Fig. 1. The main results indicate that matrix plastic deformation and distribution of carbide phase have a significant contribution to erosion resistance of HCCI alloys in such conditions.",
publisher = "Vinča Institute of Nuclear Sciences - National Insittute of the Republic of Serbia, University of Belgrade, Serbian Society for Innovative Materials in Extreme Conditions (SIM-EXTREME)",
journal = "Book of Abstracts - 2nd International Conference on Innovative Materials in Extreme COnditions",
title = "Erosion wear of HCCI alloys",
url = "https://hdl.handle.net/21.15107/rcub_machinery_7775"
}

Rajičić, B., Maslarević, A., Bakić, G., Maksimović, V.,& Đukić, M.. (2024). Erosion wear of HCCI alloys. in Book of Abstracts - 2nd International Conference on Innovative Materials in Extreme COnditions
Vinča Institute of Nuclear Sciences - National Insittute of the Republic of Serbia, University of Belgrade..
https://hdl.handle.net/21.15107/rcub_machinery_7775

Rajičić B, Maslarević A, Bakić G, Maksimović V, Đukić M. Erosion wear of HCCI alloys. in Book of Abstracts - 2nd International Conference on Innovative Materials in Extreme COnditions. 2024;.
https://hdl.handle.net/21.15107/rcub_machinery_7775 .

Rajičić, Bratislav, Maslarević, Aleksandar, Bakić, Gordana, Maksimović, Vesna, Đukić, Miloš, "Erosion wear of HCCI alloys" in Book of Abstracts - 2nd International Conference on Innovative Materials in Extreme COnditions (2024),
https://hdl.handle.net/21.15107/rcub_machinery_7775 .

TY  - JOUR
AU  - Rajičić, Bratislav
AU  - Maslarević, Aleksandar
AU  - Bakić, Gordana
AU  - Maksimović, Vesna
AU  - Đukić, Miloš
PY  - 2023
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/4604
AB  - In this study, two high chromium cast irons
(HCCI) with different chromium content (15%Cr and
25%Cr), in as-cast and annealed conditions (heat-treated,
HT), were tested to determine the erosion wear behavior of
these alloys. Erosion tests were done using a gas blast sand
facility with high erodent particle velocity (90 m/s) and high
erodent feed rate, at an impact angle of 45°, which represents
conditions similar to service conditions of some components
of thermal power plants using pulverized high mineral content
coals. To identify erosion mechanisms, microstructural
characterization was done by a scanning electron microscope
on samples before and after erosion tests. Identification of
microstructural phases was done by X-ray diffraction analysis.
The main results of the tests shown in this paper indicate
that matrix plastic deformation and distribution of carbide
phase have a significant contribution to erosion resistance of
HCCI alloys in severe erosion service conditions.
PB  - Springer
T2  - Transactions of The Indian Institute of Metals
T1  - Erosion Wear Behavior of High Chromium Cast Irons
DO  - 10.1007/s12666-022-02860-7
ER  - 

@article{
author = "Rajičić, Bratislav and Maslarević, Aleksandar and Bakić, Gordana and Maksimović, Vesna and Đukić, Miloš",
year = "2023",
abstract = "In this study, two high chromium cast irons
(HCCI) with different chromium content (15%Cr and
25%Cr), in as-cast and annealed conditions (heat-treated,
HT), were tested to determine the erosion wear behavior of
these alloys. Erosion tests were done using a gas blast sand
facility with high erodent particle velocity (90 m/s) and high
erodent feed rate, at an impact angle of 45°, which represents
conditions similar to service conditions of some components
of thermal power plants using pulverized high mineral content
coals. To identify erosion mechanisms, microstructural
characterization was done by a scanning electron microscope
on samples before and after erosion tests. Identification of
microstructural phases was done by X-ray diffraction analysis.
The main results of the tests shown in this paper indicate
that matrix plastic deformation and distribution of carbide
phase have a significant contribution to erosion resistance of
HCCI alloys in severe erosion service conditions.",
publisher = "Springer",
journal = "Transactions of The Indian Institute of Metals",
title = "Erosion Wear Behavior of High Chromium Cast Irons",
doi = "10.1007/s12666-022-02860-7"
}

Rajičić, B., Maslarević, A., Bakić, G., Maksimović, V.,& Đukić, M.. (2023). Erosion Wear Behavior of High Chromium Cast Irons. in Transactions of The Indian Institute of Metals
Springer..
https://doi.org/10.1007/s12666-022-02860-7

Rajičić B, Maslarević A, Bakić G, Maksimović V, Đukić M. Erosion Wear Behavior of High Chromium Cast Irons. in Transactions of The Indian Institute of Metals. 2023;.
doi:10.1007/s12666-022-02860-7 .

Rajičić, Bratislav, Maslarević, Aleksandar, Bakić, Gordana, Maksimović, Vesna, Đukić, Miloš, "Erosion Wear Behavior of High Chromium Cast Irons" in Transactions of The Indian Institute of Metals (2023),
https://doi.org/10.1007/s12666-022-02860-7 . .

TY  - CONF
AU  - Pavkov, Vladimir
AU  - Bakić, Gordana
AU  - Maksimović, Vesna
AU  - Đukić, Miloš
AU  - Rajičić, Bratislav
AU  - Maslarević, Aleksandar
AU  - Matović, Branko
PY  - 2022
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/7430
AB  - One of the most responsible elements of modern steam boilers are steam superheaters and reheaters.
These heating surfaces are inside the boiler chamber and consist of tubes connected to the inlet and
outlet header. Due to the complexity of service conditions, boiler tubes are exposed to processes of
gradual degradation, and consequently a decrease in operating performance and reliability.
In the operation of thermal power plants, irreversible metal losses resulting from corrosion can
cause tube failure and plant outage. Considering the loss of materials, gas corrosion in the dry gas
atmosphere due to the high temperature is of great importance. Gas corrosion can be expressed in
the boiler tubing system due to the presence of sulfur compounds in the flue gases. For this reason,
it must be borne in mind that the outer surface of a tube of final reheater has different damage
mechanisms during operation, and one of them is gas corrosion. Gas corrosion causes material loss
and provides a site for crack initiation and propagation, which can compromise the integrity of the
pressure vessel.
In this paper, a tube of a final reheater from a 210 MW power plant was tested. The tube was in
service 200,000 h at a working temperature of 540 °C and a maximum working pressure of 4.6
MPa. The tube is made of low alloy Cr-Mo-V steel, class 12H1MF (GOST). After long-term
service, a rough surface and loss of the material in the form of a crater were observed on the outer
surface of the tube as a result of the effect of gas corrosion, together with the change of
microstructure due to elevated service temperature. The measured depth of damage to the tube is
120 m. The presence of gas corrosion on the tube was confirmed and measured by an optical
microscope, Figure 1.
PB  - Belgrade : Vinča Institute of Nuclear Sciences - National Institute of thе Republic of Serbia, University of Belgrade
PB  - Belgrade : Serbian Society for Innovative Materials in Extreme Conditions (SIM-EXTREME)
C3  - Program and Book of abstracts of the 1st Intentational conference on innovativ materials in extreme conditions IMEC2022
T1  - Damage to a tube of output reheater due to gas corrosion
UR  - https://hdl.handle.net/21.15107/rcub_machinery_7430
ER  - 

@conference{
author = "Pavkov, Vladimir and Bakić, Gordana and Maksimović, Vesna and Đukić, Miloš and Rajičić, Bratislav and Maslarević, Aleksandar and Matović, Branko",
year = "2022",
abstract = "One of the most responsible elements of modern steam boilers are steam superheaters and reheaters.
These heating surfaces are inside the boiler chamber and consist of tubes connected to the inlet and
outlet header. Due to the complexity of service conditions, boiler tubes are exposed to processes of
gradual degradation, and consequently a decrease in operating performance and reliability.
In the operation of thermal power plants, irreversible metal losses resulting from corrosion can
cause tube failure and plant outage. Considering the loss of materials, gas corrosion in the dry gas
atmosphere due to the high temperature is of great importance. Gas corrosion can be expressed in
the boiler tubing system due to the presence of sulfur compounds in the flue gases. For this reason,
it must be borne in mind that the outer surface of a tube of final reheater has different damage
mechanisms during operation, and one of them is gas corrosion. Gas corrosion causes material loss
and provides a site for crack initiation and propagation, which can compromise the integrity of the
pressure vessel.
In this paper, a tube of a final reheater from a 210 MW power plant was tested. The tube was in
service 200,000 h at a working temperature of 540 °C and a maximum working pressure of 4.6
MPa. The tube is made of low alloy Cr-Mo-V steel, class 12H1MF (GOST). After long-term
service, a rough surface and loss of the material in the form of a crater were observed on the outer
surface of the tube as a result of the effect of gas corrosion, together with the change of
microstructure due to elevated service temperature. The measured depth of damage to the tube is
120 m. The presence of gas corrosion on the tube was confirmed and measured by an optical
microscope, Figure 1.",
publisher = "Belgrade : Vinča Institute of Nuclear Sciences - National Institute of thе Republic of Serbia, University of Belgrade, Belgrade : Serbian Society for Innovative Materials in Extreme Conditions (SIM-EXTREME)",
journal = "Program and Book of abstracts of the 1st Intentational conference on innovativ materials in extreme conditions IMEC2022",
title = "Damage to a tube of output reheater due to gas corrosion",
url = "https://hdl.handle.net/21.15107/rcub_machinery_7430"
}

Pavkov, V., Bakić, G., Maksimović, V., Đukić, M., Rajičić, B., Maslarević, A.,& Matović, B.. (2022). Damage to a tube of output reheater due to gas corrosion. in Program and Book of abstracts of the 1st Intentational conference on innovativ materials in extreme conditions IMEC2022
Belgrade : Vinča Institute of Nuclear Sciences - National Institute of thе Republic of Serbia, University of Belgrade..
https://hdl.handle.net/21.15107/rcub_machinery_7430

Pavkov V, Bakić G, Maksimović V, Đukić M, Rajičić B, Maslarević A, Matović B. Damage to a tube of output reheater due to gas corrosion. in Program and Book of abstracts of the 1st Intentational conference on innovativ materials in extreme conditions IMEC2022. 2022;.
https://hdl.handle.net/21.15107/rcub_machinery_7430 .

Pavkov, Vladimir, Bakić, Gordana, Maksimović, Vesna, Đukić, Miloš, Rajičić, Bratislav, Maslarević, Aleksandar, Matović, Branko, "Damage to a tube of output reheater due to gas corrosion" in Program and Book of abstracts of the 1st Intentational conference on innovativ materials in extreme conditions IMEC2022 (2022),
https://hdl.handle.net/21.15107/rcub_machinery_7430 .

TY  - JOUR
AU  - Sedmak, Aleksandar
AU  - Zaidi, Radzeya
AU  - Vujicić, Borivoje
AU  - Šarkočević, Živče
AU  - Kirin, Snežana
AU  - Stamenić, Zoran
AU  - Đukić, Miloš
AU  - Bakić, Gordana
PY  - 2022
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3703
AB  - Corrosion effects on structural integrity and life of oil rig welded pipes are analysed by experimental, analytical, and numerical methods. Experiments were performed using standard tensile specimens and CT specimens for static loading, Charpy specimens for impact loading, and 3 Point Bending specimens for fatigue crack growth with amplitude loading. In each case new and old pipes were used to evaluate corrosion effects. Results indicated negligible corrosion effects in the case of tensile properties and impact toughness, and strong effects in the case of fracture toughness and especially fatigue crack growth rates, increasing the risk of static failure and reducing significantly structural life. Analytical expressions are used for oil rig pipe structural integrity and life assessment to quantify these effects. Recently introduced risk-based approach is applied to analyse oil rig drill pipe with a corrosion defect treated as a surface crack.
PB  - Savez hemijskih inženjera, Beograd
T2  - Hemijska Industrija
T1  - Corrosion effects on structural integrity and life of oil rig drill pipes
EP  - 177
IS  - 3
SP  - 167
VL  - 76
DO  - 10.2298/HEMIND220222014S
ER  - 

@article{
author = "Sedmak, Aleksandar and Zaidi, Radzeya and Vujicić, Borivoje and Šarkočević, Živče and Kirin, Snežana and Stamenić, Zoran and Đukić, Miloš and Bakić, Gordana",
year = "2022",
abstract = "Corrosion effects on structural integrity and life of oil rig welded pipes are analysed by experimental, analytical, and numerical methods. Experiments were performed using standard tensile specimens and CT specimens for static loading, Charpy specimens for impact loading, and 3 Point Bending specimens for fatigue crack growth with amplitude loading. In each case new and old pipes were used to evaluate corrosion effects. Results indicated negligible corrosion effects in the case of tensile properties and impact toughness, and strong effects in the case of fracture toughness and especially fatigue crack growth rates, increasing the risk of static failure and reducing significantly structural life. Analytical expressions are used for oil rig pipe structural integrity and life assessment to quantify these effects. Recently introduced risk-based approach is applied to analyse oil rig drill pipe with a corrosion defect treated as a surface crack.",
publisher = "Savez hemijskih inženjera, Beograd",
journal = "Hemijska Industrija",
title = "Corrosion effects on structural integrity and life of oil rig drill pipes",
pages = "177-167",
number = "3",
volume = "76",
doi = "10.2298/HEMIND220222014S"
}

Sedmak, A., Zaidi, R., Vujicić, B., Šarkočević, Ž., Kirin, S., Stamenić, Z., Đukić, M.,& Bakić, G.. (2022). Corrosion effects on structural integrity and life of oil rig drill pipes. in Hemijska Industrija
Savez hemijskih inženjera, Beograd., 76(3), 167-177.
https://doi.org/10.2298/HEMIND220222014S

Sedmak A, Zaidi R, Vujicić B, Šarkočević Ž, Kirin S, Stamenić Z, Đukić M, Bakić G. Corrosion effects on structural integrity and life of oil rig drill pipes. in Hemijska Industrija. 2022;76(3):167-177.
doi:10.2298/HEMIND220222014S .

Sedmak, Aleksandar, Zaidi, Radzeya, Vujicić, Borivoje, Šarkočević, Živče, Kirin, Snežana, Stamenić, Zoran, Đukić, Miloš, Bakić, Gordana, "Corrosion effects on structural integrity and life of oil rig drill pipes" in Hemijska Industrija, 76, no. 3 (2022):167-177,
https://doi.org/10.2298/HEMIND220222014S . .

TY  - JOUR
AU  - Wasim, Muhammad
AU  - Đukić, Miloš
PY  - 2022
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3700
AB  - This paper presents an updated review of the external corrosion and failure mechanisms of buried natural gas and oil pipelines. Various forms of external corrosion and failure mechanisms such as hydrogen-induced cracking (HIC), hydrogen embrittlement (HE), corrosion fatigue (CF), stress corrosion cracking (SCC) and microbiologi-cally influenced corrosion (MIC) for oil and gas pipelines are thoroughly reviewed. The factors influencing external corrosion and possible forms of environment-assisted cracking (EAC) of pipeline steels in the soil are also reviewed and analyzed in depth. In addition, the existing monitoring tools for the external corrosion assessment and the models for corrosion prevention and prediction, failure occurrence, and remaining life of oil and gas pipelines, are analyzed. Moreover, the articles on external corrosion management, reliability-based models, risk-based models, and integrity assessment including machine learning and fuzzy logic approaches, are also reviewed. The conclusions and recommendations for future research in the prevention and prediction of external corrosion are presented at the end.
PB  - Elsevier Sci Ltd, Oxford
T2  - Journal of Natural Gas Science and Engineering
T1  - External corrosion of oil and gas pipelines: A review of failure mechanisms and predictive preventions
VL  - 100
DO  - 10.1016/j.jngse.2022.104467
ER  - 

@article{
author = "Wasim, Muhammad and Đukić, Miloš",
year = "2022",
abstract = "This paper presents an updated review of the external corrosion and failure mechanisms of buried natural gas and oil pipelines. Various forms of external corrosion and failure mechanisms such as hydrogen-induced cracking (HIC), hydrogen embrittlement (HE), corrosion fatigue (CF), stress corrosion cracking (SCC) and microbiologi-cally influenced corrosion (MIC) for oil and gas pipelines are thoroughly reviewed. The factors influencing external corrosion and possible forms of environment-assisted cracking (EAC) of pipeline steels in the soil are also reviewed and analyzed in depth. In addition, the existing monitoring tools for the external corrosion assessment and the models for corrosion prevention and prediction, failure occurrence, and remaining life of oil and gas pipelines, are analyzed. Moreover, the articles on external corrosion management, reliability-based models, risk-based models, and integrity assessment including machine learning and fuzzy logic approaches, are also reviewed. The conclusions and recommendations for future research in the prevention and prediction of external corrosion are presented at the end.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Journal of Natural Gas Science and Engineering",
title = "External corrosion of oil and gas pipelines: A review of failure mechanisms and predictive preventions",
volume = "100",
doi = "10.1016/j.jngse.2022.104467"
}

Wasim, M.,& Đukić, M.. (2022). External corrosion of oil and gas pipelines: A review of failure mechanisms and predictive preventions. in Journal of Natural Gas Science and Engineering
Elsevier Sci Ltd, Oxford., 100.
https://doi.org/10.1016/j.jngse.2022.104467

Wasim M, Đukić M. External corrosion of oil and gas pipelines: A review of failure mechanisms and predictive preventions. in Journal of Natural Gas Science and Engineering. 2022;100.
doi:10.1016/j.jngse.2022.104467 .

Wasim, Muhammad, Đukić, Miloš, "External corrosion of oil and gas pipelines: A review of failure mechanisms and predictive preventions" in Journal of Natural Gas Science and Engineering, 100 (2022),
https://doi.org/10.1016/j.jngse.2022.104467 . .

TY  - CONF
AU  - Bakić, Gordana
AU  - Đukić, Miloš
AU  - Rajičić, Bratislav
AU  - Maslarević, Aleksandar
AU  - Maksimović, Vesna
AU  - Pavkov, Vladimir
AU  - Milošević, Nenad
PY  - 2022
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/4429
C3  - Program and Book of abstracts of the 1st Intentational conference on innovativ materials in extreme conditions IMEC2022
T1  - High temperature failures of metals
UR  - https://hdl.handle.net/21.15107/rcub_machinery_4429
ER  - 

@conference{
author = "Bakić, Gordana and Đukić, Miloš and Rajičić, Bratislav and Maslarević, Aleksandar and Maksimović, Vesna and Pavkov, Vladimir and Milošević, Nenad",
year = "2022",
journal = "Program and Book of abstracts of the 1st Intentational conference on innovativ materials in extreme conditions IMEC2022",
title = "High temperature failures of metals",
url = "https://hdl.handle.net/21.15107/rcub_machinery_4429"
}

Bakić, G., Đukić, M., Rajičić, B., Maslarević, A., Maksimović, V., Pavkov, V.,& Milošević, N.. (2022). High temperature failures of metals. in Program and Book of abstracts of the 1st Intentational conference on innovativ materials in extreme conditions IMEC2022.
https://hdl.handle.net/21.15107/rcub_machinery_4429

Bakić G, Đukić M, Rajičić B, Maslarević A, Maksimović V, Pavkov V, Milošević N. High temperature failures of metals. in Program and Book of abstracts of the 1st Intentational conference on innovativ materials in extreme conditions IMEC2022. 2022;.
https://hdl.handle.net/21.15107/rcub_machinery_4429 .

Bakić, Gordana, Đukić, Miloš, Rajičić, Bratislav, Maslarević, Aleksandar, Maksimović, Vesna, Pavkov, Vladimir, Milošević, Nenad, "High temperature failures of metals" in Program and Book of abstracts of the 1st Intentational conference on innovativ materials in extreme conditions IMEC2022 (2022),
https://hdl.handle.net/21.15107/rcub_machinery_4429 .

TY  - CONF
AU  - Sedmak, Aleksandar
AU  - Tadić, Srđan
AU  - Kirin, Snežana
AU  - Đukić, Miloš
AU  - Al Kateb, M.
PY  - 2022
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3811
AB  - Stress corrosion crack growth in mild steel was investigated by using the finite element simulation method. A model simulating crack growth considered an edge crack located on the metal surface, under tensile remote stress acting on a sample. Numerical analysis was performed using the Code _Aster software to simulate crack growth. Three related variables were evaluated. K, dK/da and maximum stress. Values of these variables were recorded every 2 mm of the crack growth. Results showed an increase in the values of K and maximum stress, while there was a decrease in the values of dK/da, as the crack length increased. There was a good agreement between the results obtained analytically in the literature and numerically obtained here by using finite elements. The results obtained here are consistent with what has been obtained in most of the studies that have been conducted in this regard.
PB  - Springer Science and Business Media Deutschland GmbH
C3  - Lecture Notes in Networks and Systems
T1  - Stress Corrosion Crack Growth Simulation by the Finite Element Method
EP  - 274
SP  - 257
VL  - 323
DO  - 10.1007/978-3-030-86009-7_14
ER  - 

@conference{
author = "Sedmak, Aleksandar and Tadić, Srđan and Kirin, Snežana and Đukić, Miloš and Al Kateb, M.",
year = "2022",
abstract = "Stress corrosion crack growth in mild steel was investigated by using the finite element simulation method. A model simulating crack growth considered an edge crack located on the metal surface, under tensile remote stress acting on a sample. Numerical analysis was performed using the Code _Aster software to simulate crack growth. Three related variables were evaluated. K, dK/da and maximum stress. Values of these variables were recorded every 2 mm of the crack growth. Results showed an increase in the values of K and maximum stress, while there was a decrease in the values of dK/da, as the crack length increased. There was a good agreement between the results obtained analytically in the literature and numerically obtained here by using finite elements. The results obtained here are consistent with what has been obtained in most of the studies that have been conducted in this regard.",
publisher = "Springer Science and Business Media Deutschland GmbH",
journal = "Lecture Notes in Networks and Systems",
title = "Stress Corrosion Crack Growth Simulation by the Finite Element Method",
pages = "274-257",
volume = "323",
doi = "10.1007/978-3-030-86009-7_14"
}

Sedmak, A., Tadić, S., Kirin, S., Đukić, M.,& Al Kateb, M.. (2022). Stress Corrosion Crack Growth Simulation by the Finite Element Method. in Lecture Notes in Networks and Systems
Springer Science and Business Media Deutschland GmbH., 323, 257-274.
https://doi.org/10.1007/978-3-030-86009-7_14

Sedmak A, Tadić S, Kirin S, Đukić M, Al Kateb M. Stress Corrosion Crack Growth Simulation by the Finite Element Method. in Lecture Notes in Networks and Systems. 2022;323:257-274.
doi:10.1007/978-3-030-86009-7_14 .

Sedmak, Aleksandar, Tadić, Srđan, Kirin, Snežana, Đukić, Miloš, Al Kateb, M., "Stress Corrosion Crack Growth Simulation by the Finite Element Method" in Lecture Notes in Networks and Systems, 323 (2022):257-274,
https://doi.org/10.1007/978-3-030-86009-7_14 . .

TY  - JOUR
AU  - Zelmati, Djamel
AU  - Bouledroua, Omar
AU  - Ghelloudj, Oualid
AU  - Amirat, Abdelaziz
AU  - Đukić, Miloš
PY  - 2022
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3778
AB  - Considering corrosion rate during the remaining life assessment of aging pipelines is fundamental to calculate the interval between two consecutive inspections. A total of 798 internal and external corrosion defects have been detected, using the Magnetic Flux Leakage intelligent inspection tool, over 48 km of a pipeline length located in the west region of Algeria. The statistical analysis has shown that there is a strong correlation between the corrosion defect length and the corrosion defect circumferential width, with a significant correlation coefficient equal to 82.87%. A probabilistic methodology is presented for the assessment of the remaining life of a corroded pipeline transporting gas, and a finite element method (FEM) was used to assess the pipeline failure pressure. The numerical FEM modeling results were compared with the commonly used codes-models for calculating limit pressure to establish a more realistic and accurate engineering model. The reliability analysis of an API 5L X60 steel made Algerian natural gas pipeline, in service for thirty years, and exposed to active corrosion attack, is presented. The sensitivity analysis of the basic random variables within the nonlinear limit state function was carried out to bring out the relative contribution of each variable affecting the remaining life of corroded pipelines. The reliability analysis is carried out by using Breitung's formula, based on the second-order reliability method (SORM). The reliability assessment of the corroded pipeline is based on the usage of the notched failure assessment diagram (NFAD), different codes for the calculation of the failure pressure, and the numerical results using the finite element analyses (FEA) software ANSYS.
PB  - Elsevier Sci Ltd, Oxford
T2  - Journal of Natural Gas Science and Engineering
T1  - A probabilistic approach to estimate the remaining life and reliability of corroded pipelines
VL  - 99
DO  - 10.1016/j.jngse.2021.104387
ER  - 

@article{
author = "Zelmati, Djamel and Bouledroua, Omar and Ghelloudj, Oualid and Amirat, Abdelaziz and Đukić, Miloš",
year = "2022",
abstract = "Considering corrosion rate during the remaining life assessment of aging pipelines is fundamental to calculate the interval between two consecutive inspections. A total of 798 internal and external corrosion defects have been detected, using the Magnetic Flux Leakage intelligent inspection tool, over 48 km of a pipeline length located in the west region of Algeria. The statistical analysis has shown that there is a strong correlation between the corrosion defect length and the corrosion defect circumferential width, with a significant correlation coefficient equal to 82.87%. A probabilistic methodology is presented for the assessment of the remaining life of a corroded pipeline transporting gas, and a finite element method (FEM) was used to assess the pipeline failure pressure. The numerical FEM modeling results were compared with the commonly used codes-models for calculating limit pressure to establish a more realistic and accurate engineering model. The reliability analysis of an API 5L X60 steel made Algerian natural gas pipeline, in service for thirty years, and exposed to active corrosion attack, is presented. The sensitivity analysis of the basic random variables within the nonlinear limit state function was carried out to bring out the relative contribution of each variable affecting the remaining life of corroded pipelines. The reliability analysis is carried out by using Breitung's formula, based on the second-order reliability method (SORM). The reliability assessment of the corroded pipeline is based on the usage of the notched failure assessment diagram (NFAD), different codes for the calculation of the failure pressure, and the numerical results using the finite element analyses (FEA) software ANSYS.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Journal of Natural Gas Science and Engineering",
title = "A probabilistic approach to estimate the remaining life and reliability of corroded pipelines",
volume = "99",
doi = "10.1016/j.jngse.2021.104387"
}

Zelmati, D., Bouledroua, O., Ghelloudj, O., Amirat, A.,& Đukić, M.. (2022). A probabilistic approach to estimate the remaining life and reliability of corroded pipelines. in Journal of Natural Gas Science and Engineering
Elsevier Sci Ltd, Oxford., 99.
https://doi.org/10.1016/j.jngse.2021.104387

Zelmati D, Bouledroua O, Ghelloudj O, Amirat A, Đukić M. A probabilistic approach to estimate the remaining life and reliability of corroded pipelines. in Journal of Natural Gas Science and Engineering. 2022;99.
doi:10.1016/j.jngse.2021.104387 .

Zelmati, Djamel, Bouledroua, Omar, Ghelloudj, Oualid, Amirat, Abdelaziz, Đukić, Miloš, "A probabilistic approach to estimate the remaining life and reliability of corroded pipelines" in Journal of Natural Gas Science and Engineering, 99 (2022),
https://doi.org/10.1016/j.jngse.2021.104387 . .

TY  - JOUR
AU  - Muthanna, Bassam Gamal Nasser
AU  - Bouledroua, Omar
AU  - Meriem-Benziane, Madjid
AU  - Setvati, Mahdi Razavi
AU  - Đukić, Miloš
PY  - 2021
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3465
AB  - Pipe elbows (bends) are considered critical pressurized components in the piping systems and pipelines due to their stress intensification and the effect of bend curvature. They are prone and hence more exposed to different corrosion failure modes than straight pipes. Late detection of such elbow damages can lead to different dangerous and emergency situations which cause environmental disasters, pollution, substantial consumer losses and a serious threat to human life. A comprehensive safety and reliability assessment of pipe elbows, including usage of prediction models, can provide significant increases in the service life of pipelines. It is well known that the limit pressure is an important parameter to assess the piping integrity. In this paper, the integrity assessment of damaged pipeline elbows made of API 5L X52 steel was done within the framework of numerical modeling using the finite element method (FEM) and finite element analysis (FEA). The evaluation of numerically FEM modeled limit pressure in the corroded elbow containing a rectangular parallelepiped-shaped corrosion defect with rounded corners at the intrados section was done and compared to different codes for calculating limit pressure. Moreover, the area with the corrosion defects with different relative defect depth to wall thickness ratios was FEM modeled at the intrados section of the pipe elbow where the highest hoop stress exists. The results showed that the codes for straight pipes could not be applied for the pipe elbows due to the significantly higher error in the obtained limit pressure value compared with numerically FEM obtained results. However, the results for modified codes, adapted for the pipe elbow case using the Goodall formula for calculation of the hoop stress in pipe elbows with defects are pretty consistent with the numerical FEA results. The notch failure assessment diagram (NFAD) was also used for the straight pipe and pipe bends with different corrosion defect depth ratios, while the obtained critical defect depth ratios further highlighted the criticality of pipe elbows as an essential pipeline component.
PB  - Elsevier Sci Ltd, Oxford
T2  - International Journal of Pressure Vessels and Piping
T1  - Assessment of corroded API 5L X52 pipe elbow using a modified failure assessment diagram
VL  - 190
DO  - 10.1016/j.ijpvp.2020.104291
ER  - 

@article{
author = "Muthanna, Bassam Gamal Nasser and Bouledroua, Omar and Meriem-Benziane, Madjid and Setvati, Mahdi Razavi and Đukić, Miloš",
year = "2021",
abstract = "Pipe elbows (bends) are considered critical pressurized components in the piping systems and pipelines due to their stress intensification and the effect of bend curvature. They are prone and hence more exposed to different corrosion failure modes than straight pipes. Late detection of such elbow damages can lead to different dangerous and emergency situations which cause environmental disasters, pollution, substantial consumer losses and a serious threat to human life. A comprehensive safety and reliability assessment of pipe elbows, including usage of prediction models, can provide significant increases in the service life of pipelines. It is well known that the limit pressure is an important parameter to assess the piping integrity. In this paper, the integrity assessment of damaged pipeline elbows made of API 5L X52 steel was done within the framework of numerical modeling using the finite element method (FEM) and finite element analysis (FEA). The evaluation of numerically FEM modeled limit pressure in the corroded elbow containing a rectangular parallelepiped-shaped corrosion defect with rounded corners at the intrados section was done and compared to different codes for calculating limit pressure. Moreover, the area with the corrosion defects with different relative defect depth to wall thickness ratios was FEM modeled at the intrados section of the pipe elbow where the highest hoop stress exists. The results showed that the codes for straight pipes could not be applied for the pipe elbows due to the significantly higher error in the obtained limit pressure value compared with numerically FEM obtained results. However, the results for modified codes, adapted for the pipe elbow case using the Goodall formula for calculation of the hoop stress in pipe elbows with defects are pretty consistent with the numerical FEA results. The notch failure assessment diagram (NFAD) was also used for the straight pipe and pipe bends with different corrosion defect depth ratios, while the obtained critical defect depth ratios further highlighted the criticality of pipe elbows as an essential pipeline component.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "International Journal of Pressure Vessels and Piping",
title = "Assessment of corroded API 5L X52 pipe elbow using a modified failure assessment diagram",
volume = "190",
doi = "10.1016/j.ijpvp.2020.104291"
}

Muthanna, B. G. N., Bouledroua, O., Meriem-Benziane, M., Setvati, M. R.,& Đukić, M.. (2021). Assessment of corroded API 5L X52 pipe elbow using a modified failure assessment diagram. in International Journal of Pressure Vessels and Piping
Elsevier Sci Ltd, Oxford., 190.
https://doi.org/10.1016/j.ijpvp.2020.104291

Muthanna BGN, Bouledroua O, Meriem-Benziane M, Setvati MR, Đukić M. Assessment of corroded API 5L X52 pipe elbow using a modified failure assessment diagram. in International Journal of Pressure Vessels and Piping. 2021;190.
doi:10.1016/j.ijpvp.2020.104291 .

Muthanna, Bassam Gamal Nasser, Bouledroua, Omar, Meriem-Benziane, Madjid, Setvati, Mahdi Razavi, Đukić, Miloš, "Assessment of corroded API 5L X52 pipe elbow using a modified failure assessment diagram" in International Journal of Pressure Vessels and Piping, 190 (2021),
https://doi.org/10.1016/j.ijpvp.2020.104291 . .

TY  - BOOK
AU  - Bakić, Gordana
AU  - Đukić, Miloš
AU  - Šijački Žeravčić, Vera
PY  - 2021
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/6383
AB  - Projektovanje i vek mašinskih konstrukcija su u direktnoj vezi sa uslovima
rada kojima su one izložene. Uslovi rada pogoduju pojavi različitih oštećenja
čije prisustvo na specifičan način menja prvobitno stanje materijala
konstrukcije. Da bi se pojava oštećenja vitalne opreme svela na najmanju
meru, neophodno je u svakom pojedinačnom slučaju odrediti delujući
mehanizam oštećenja, pojavu i širenje oštećenja, kao i stvarni uzročnik koji
to oštećenje izaziva.
Važnost ovih saznanja leži u činjenici da promene izazvane različitim
mehanizmima oštećenja dovode do promene osobina konstrukcije, tako što
se menjaju svojstva materijala i/ili geometrija, tj. poprečni presek mašinskog
dela. Usled ovakvih promena, prvobitni projektni uslovi konstrukcija više nisu
merodavni, mašinske konstrukcije gube svoju radnu sposobnost koja
vremenom opada do te mere da dolazi do otkaza koji se najčešće manifestuje
lomom ili prekomernom deformacijom dela. Zato može da se kaže da u
velikom broju slučajeva pojave oštećenja, posebno kod složenih sistema,
između teorije i prakse postoji značajan raskorak - delujući mehanizam
oštećenja je funkcija velikog broja uticajnih parametara, od kojih neki ne
mogu čak ni da budu pretpostavljeni, pa samim tim ni kontrolisani.
Stanje materijala kao i sklonost ka pojavi oštećenja u uslovima oštrih
parametara radne sredine nekog sistema ili njegovog dela, ali i mehanizmi
oštećenja koji počnu da deluju imaju ključnu ulogu i u proceni preostalog
resursa za rad datog sistema i u proceni vremena neophodne zamene
sistema/dela, čime smo zatvorili krug i ponovo došli na početak.
Gradivo u ovom udžbeniku je namenjeno studentima koji slušaju
predmet Ponašanje zavarenih spojeva u eksploataciji na Master akademskim
studijama Mašinskog fakulteta Univerziteta u Beogradu, ali i za predmete na
doktorskim studijama koji obrađuju mehanizme oštećenja i koroziju -
Ponašanje i pouzdanost materijala u eksploataciji i Кorozija materijala i
zaštita. Cilj ovog udžbenika je da se studentima ne samo približe osnove
mehanizama oštećenja mašinskih konstrukcija i efekti do kojih oni dovode,
već i da se upoznaju i nauče da prepoznaju osnovne tipove nekih vrsta
oštećenja (npr. osnovne oblike korozije, oštećenja od puzanja, zamora, itd.).
Za sve mehanizme oštećenja pored opšteg razmatranja, posebno je
analizirano kako se mehanizmi oštećenja manifestuju kod zavarenih spojeva.
Ovo je prvenstveno urađeno zbog studenata sa modula Zavarivanje i
zavarene konstrukcije na Mašinskom fakultetu, ali i zbog studenata sa drugih
modula koji godinama biraju ovaj predmet u okviru svog master programa.
Za detekciju većine oštećenja koriste se različite tehnike ispitivanja, od
kojih je studentima mašinstva najmanje poznata mikroskopija pa je stoga u
knjizi posvećena posebna pažnja osnovama mikroskopije i načinima njene
primene u otkrivanju oštećenja. S obzirom da oštećenja nastaju u
kompleksnim uslovima, u gradivu su istaknuti dominantni aspekti koji utiču na
oštećenja.
Autori od srca zahvaljuju recenzentima prof. dr Radici Prokić Cvetković i
dr Vesni Maksimović, naučnom savetniku, na uloženom trudu i korisnim
sugestijama da ova knjiga dobije konačan izgled.
Posebnu zahvalnost autori duguju laboratoriji „Tehnički centar-Inspekt“
iz Obrenovca na čelu sa direktorkom g-đom Vesnom Peruničić, dipl.inž.met.
koji su naši dugogodišnji saradnici sa kojima smo izradili veliki broja
ekspertiza, odakle i potiče najveći broj neverovatno lepih mikrofotografija
mikrostruktura, koje smo koristili u tekstu i bez kojih najveći broj obrađenih
mehanizama oštećenja i lomova ne bi mogao da budu kvalitetno ilustrovan.
Takođe, autori od srca zahvaljuju i našim dragim saradnicima Bratislavu
Rajičiću, dr Aleksandru Maslareviću, naučnom saradniku, i dr Biljani Anđelić,
redovnom profesoru u penziji, na pomoći oko izrade ovog udžbenika i što su
imali strpljenja svih ovih godina, zatim, prof. dr Draganu Cvetkoviću koji nam
je uredio naslovne strane, kao i laboratoriji „Zavod za zavarivanje“ koja nam
je ustupila neke svoje fotografije za ilustraciju.
I za kraj, treba navesti u ovom uvodnom delu - multidisciplinarnost tokom
istraživanja je preduslov da bi mogla da se pouzdano izvode analize uzroka
pojave oštećenja i lomova.
Svaku sugestiju od strane čitalaca i korisnika ovog udžbenika, u smislu
poboljšanja njegovog kvaliteta, autori će rado čuti i prihvatiti.
PB  - Univerzitet u Beogradu, Mašinski fakultet
T2  - Univerzitet u Beogradu, Mašinski fakultet
T1  - Osnovni mehanizmi oštećenja mašinskih konstrukcija
UR  - https://hdl.handle.net/21.15107/rcub_machinery_6383
ER  - 

@book{
author = "Bakić, Gordana and Đukić, Miloš and Šijački Žeravčić, Vera",
year = "2021",
abstract = "Projektovanje i vek mašinskih konstrukcija su u direktnoj vezi sa uslovima
rada kojima su one izložene. Uslovi rada pogoduju pojavi različitih oštećenja
čije prisustvo na specifičan način menja prvobitno stanje materijala
konstrukcije. Da bi se pojava oštećenja vitalne opreme svela na najmanju
meru, neophodno je u svakom pojedinačnom slučaju odrediti delujući
mehanizam oštećenja, pojavu i širenje oštećenja, kao i stvarni uzročnik koji
to oštećenje izaziva.
Važnost ovih saznanja leži u činjenici da promene izazvane različitim
mehanizmima oštećenja dovode do promene osobina konstrukcije, tako što
se menjaju svojstva materijala i/ili geometrija, tj. poprečni presek mašinskog
dela. Usled ovakvih promena, prvobitni projektni uslovi konstrukcija više nisu
merodavni, mašinske konstrukcije gube svoju radnu sposobnost koja
vremenom opada do te mere da dolazi do otkaza koji se najčešće manifestuje
lomom ili prekomernom deformacijom dela. Zato može da se kaže da u
velikom broju slučajeva pojave oštećenja, posebno kod složenih sistema,
između teorije i prakse postoji značajan raskorak - delujući mehanizam
oštećenja je funkcija velikog broja uticajnih parametara, od kojih neki ne
mogu čak ni da budu pretpostavljeni, pa samim tim ni kontrolisani.
Stanje materijala kao i sklonost ka pojavi oštećenja u uslovima oštrih
parametara radne sredine nekog sistema ili njegovog dela, ali i mehanizmi
oštećenja koji počnu da deluju imaju ključnu ulogu i u proceni preostalog
resursa za rad datog sistema i u proceni vremena neophodne zamene
sistema/dela, čime smo zatvorili krug i ponovo došli na početak.
Gradivo u ovom udžbeniku je namenjeno studentima koji slušaju
predmet Ponašanje zavarenih spojeva u eksploataciji na Master akademskim
studijama Mašinskog fakulteta Univerziteta u Beogradu, ali i za predmete na
doktorskim studijama koji obrađuju mehanizme oštećenja i koroziju -
Ponašanje i pouzdanost materijala u eksploataciji i Кorozija materijala i
zaštita. Cilj ovog udžbenika je da se studentima ne samo približe osnove
mehanizama oštećenja mašinskih konstrukcija i efekti do kojih oni dovode,
već i da se upoznaju i nauče da prepoznaju osnovne tipove nekih vrsta
oštećenja (npr. osnovne oblike korozije, oštećenja od puzanja, zamora, itd.).
Za sve mehanizme oštećenja pored opšteg razmatranja, posebno je
analizirano kako se mehanizmi oštećenja manifestuju kod zavarenih spojeva.
Ovo je prvenstveno urađeno zbog studenata sa modula Zavarivanje i
zavarene konstrukcije na Mašinskom fakultetu, ali i zbog studenata sa drugih
modula koji godinama biraju ovaj predmet u okviru svog master programa.
Za detekciju većine oštećenja koriste se različite tehnike ispitivanja, od
kojih je studentima mašinstva najmanje poznata mikroskopija pa je stoga u
knjizi posvećena posebna pažnja osnovama mikroskopije i načinima njene
primene u otkrivanju oštećenja. S obzirom da oštećenja nastaju u
kompleksnim uslovima, u gradivu su istaknuti dominantni aspekti koji utiču na
oštećenja.
Autori od srca zahvaljuju recenzentima prof. dr Radici Prokić Cvetković i
dr Vesni Maksimović, naučnom savetniku, na uloženom trudu i korisnim
sugestijama da ova knjiga dobije konačan izgled.
Posebnu zahvalnost autori duguju laboratoriji „Tehnički centar-Inspekt“
iz Obrenovca na čelu sa direktorkom g-đom Vesnom Peruničić, dipl.inž.met.
koji su naši dugogodišnji saradnici sa kojima smo izradili veliki broja
ekspertiza, odakle i potiče najveći broj neverovatno lepih mikrofotografija
mikrostruktura, koje smo koristili u tekstu i bez kojih najveći broj obrađenih
mehanizama oštećenja i lomova ne bi mogao da budu kvalitetno ilustrovan.
Takođe, autori od srca zahvaljuju i našim dragim saradnicima Bratislavu
Rajičiću, dr Aleksandru Maslareviću, naučnom saradniku, i dr Biljani Anđelić,
redovnom profesoru u penziji, na pomoći oko izrade ovog udžbenika i što su
imali strpljenja svih ovih godina, zatim, prof. dr Draganu Cvetkoviću koji nam
je uredio naslovne strane, kao i laboratoriji „Zavod za zavarivanje“ koja nam
je ustupila neke svoje fotografije za ilustraciju.
I za kraj, treba navesti u ovom uvodnom delu - multidisciplinarnost tokom
istraživanja je preduslov da bi mogla da se pouzdano izvode analize uzroka
pojave oštećenja i lomova.
Svaku sugestiju od strane čitalaca i korisnika ovog udžbenika, u smislu
poboljšanja njegovog kvaliteta, autori će rado čuti i prihvatiti.",
publisher = "Univerzitet u Beogradu, Mašinski fakultet",
journal = "Univerzitet u Beogradu, Mašinski fakultet",
title = "Osnovni mehanizmi oštećenja mašinskih konstrukcija",
url = "https://hdl.handle.net/21.15107/rcub_machinery_6383"
}

Bakić, G., Đukić, M.,& Šijački Žeravčić, V.. (2021). Osnovni mehanizmi oštećenja mašinskih konstrukcija. in Univerzitet u Beogradu, Mašinski fakultet
Univerzitet u Beogradu, Mašinski fakultet..
https://hdl.handle.net/21.15107/rcub_machinery_6383

Bakić G, Đukić M, Šijački Žeravčić V. Osnovni mehanizmi oštećenja mašinskih konstrukcija. in Univerzitet u Beogradu, Mašinski fakultet. 2021;.
https://hdl.handle.net/21.15107/rcub_machinery_6383 .

Bakić, Gordana, Đukić, Miloš, Šijački Žeravčić, Vera, "Osnovni mehanizmi oštećenja mašinskih konstrukcija" in Univerzitet u Beogradu, Mašinski fakultet (2021),
https://hdl.handle.net/21.15107/rcub_machinery_6383 .

TY  - GEN
AU  - Prokić Cvetković, Radica
AU  - Radaković, Zoran
AU  - Popović, Olivera
AU  - Bakić, Gordana
AU  - Đukić, Miloš
AU  - Rajičić, Bratislav
AU  - Milošević, Nenad
PY  - 2021
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/6328
AB  - Priručnik za lab.ispitivanja iz Mašinskih materijala 1 i Mašinskih materijala 2
PB  - Univerzitet u Beogradu, Mašinski fakultet
T2  - Univerzitet u Beogradu, Mašinski fakultet
T1  - Mašinski materijali 1 i Mašinski materijali 2 - Priručnik za laboratorijske vežbe
VL  - II
UR  - https://hdl.handle.net/21.15107/rcub_machinery_6328
ER  - 

@misc{
author = "Prokić Cvetković, Radica and Radaković, Zoran and Popović, Olivera and Bakić, Gordana and Đukić, Miloš and Rajičić, Bratislav and Milošević, Nenad",
year = "2021",
abstract = "Priručnik za lab.ispitivanja iz Mašinskih materijala 1 i Mašinskih materijala 2",
publisher = "Univerzitet u Beogradu, Mašinski fakultet",
journal = "Univerzitet u Beogradu, Mašinski fakultet",
title = "Mašinski materijali 1 i Mašinski materijali 2 - Priručnik za laboratorijske vežbe",
volume = "II",
url = "https://hdl.handle.net/21.15107/rcub_machinery_6328"
}

Prokić Cvetković, R., Radaković, Z., Popović, O., Bakić, G., Đukić, M., Rajičić, B.,& Milošević, N.. (2021). Mašinski materijali 1 i Mašinski materijali 2 - Priručnik za laboratorijske vežbe. in Univerzitet u Beogradu, Mašinski fakultet
Univerzitet u Beogradu, Mašinski fakultet., II.
https://hdl.handle.net/21.15107/rcub_machinery_6328

Prokić Cvetković R, Radaković Z, Popović O, Bakić G, Đukić M, Rajičić B, Milošević N. Mašinski materijali 1 i Mašinski materijali 2 - Priručnik za laboratorijske vežbe. in Univerzitet u Beogradu, Mašinski fakultet. 2021;II.
https://hdl.handle.net/21.15107/rcub_machinery_6328 .

Prokić Cvetković, Radica, Radaković, Zoran, Popović, Olivera, Bakić, Gordana, Đukić, Miloš, Rajičić, Bratislav, Milošević, Nenad, "Mašinski materijali 1 i Mašinski materijali 2 - Priručnik za laboratorijske vežbe" in Univerzitet u Beogradu, Mašinski fakultet, II (2021),
https://hdl.handle.net/21.15107/rcub_machinery_6328 .

TY  - BOOK
AU  - Prokić Cvetković, Radica
AU  - Popović, Olivera
AU  - Bakić, Gordana
AU  - Đukić, Miloš
PY  - 2021
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/6326
AB  - Predgovor
Predmeti koji nas okružuju izrađeni su od različitih vrsta materijala, pa je poznavanje njihovih
osobina, načina proizvodnje, postojanosti u radnom okruženju, mogućnosti nabavke
i cene od velikog značaja pri izboru materijala za konkretnu namenu. Tendencije savremenog
načina života su usmerene ka smanjenju potrošnje energije i zaštite životne sredine, pa
se pred inženjere, projektante i konstruktore postavljaju zahtevi da izaberu materijal koji
ima što manju cenu i masu uz istovremeno zadovoljavajuće fizičke, hemijske, mehaničke,
tehnološke ili neke specifične osobine. U svetu se dosta novca ulaže u istraživačke i razvojne
projekte za razvoj novih materijala ili modifikaciju osobina postojećih materijala.
Ovaj udžbenik je namenjen studentima Osnovnih akademskih studija koji slušaju predmet
Mašinski materijali 2 sa fondom časova 5 u trećem semestru na Mašinskom fakultetu
Univerziteta u Beogradu. Gradivo u ovom udžbeniku prati kontinuitet gradiva izloženog
u knjizi Mašinski materijali 1, pa je za praćenje nastave iz predmeta Mašinski materijali 2
neophodno predznanje iz tog predmeta. Cilj autora je bio da ovako složenu problematiku
što jednostavnije prikažu, a da se pri tome održi odgovarajući akademski nivo. Uvek, kada
je to bilo moguće, autori su se potrudili da odgovarajuće objašnjenje ilustruju dobrom
slikom.
Plan i program predmeta Mašinski materijali 2 se sastoji iz dve celine i to: metalni materijali
i postupci spajanja materijala zavarivanjem i lemljenjem.
U prvom delu udžbenika opisani su metalni materijali, njihov način dobijanja, kao i fizička,
hemijska i mehanička svojstva. Od metalnih materijala najviše pažnje je posvećeno
železu i njegovim legurama jer su to još uvek najzastupljeniji konstrukcioni materijali u
mašinstvu. Železo gradi dve grupe legura: čelike i gvožđa; pa je opisan način njihovog
dobijanja, mehaničke i fizičke osobine, kao i njihovo označavanje po najnovijem standardu.
Takođe su opisane neravnotežne transformacije pri hlađenju čelika, kao i termička,
termomehanička i termohemijska obrada. U nastavku je dosta pažnje posvećeno aluminijumu
i njegovim legurama, jer su oni po zastupljenosti odmah posle čelika. Bakar, nikl,
titan i drugi obojeni metali su takođe prikazani.
U drugom delu udžbenika dati su osnovni pojmovi u zavarivanju i opisani su konvencionalni
postupci zavarivanja. Takođe su prikazana ispitivanja zavarenih spojeva metodama sa razaranjem
i bez razaranja, greške u zavarenim spojevima i nivoi kvaliteta zavarenih spojeva.
Kao postupak spajanja materijala, pored zavarivanja, može da se koristi i lemljenje,
pa su na kraju opisani njegovi osnovni principi.
Na kraju knjige navedena je literatura koja može da se koristi u cilju proširenja znanja iz
ovih oblasti.
Autori se zahvaljuju recenzentima, dr Nenadu Radoviću, redovnom profesoru Tehnološkometalurškog
fakulteta Univerziteta u Beogradu i dr Aleksandru Sedmaku, profesoru emeritus
Mašinskog fakulteta Univerziteta u Beogradu, koji su svojim korisnim predlozima
i sugestijama doprineli poboljšanju kvaliteta knjige. Takođe se zahvaljujemo i kolegama
iz laboratorije "KonMat" koji su nam ustupili slike iz IBR-a, kao i kolegi dr Radovanu
Puzoviću, profesoru Mašinskog fakulteta, na nesebičnoj pomoći.
I na kraju, ne kao manje važno, želimo da istaknemo da ova knjiga sigurno na bi ovako
izgledala da nije bilo ogromnog truda i strpljenja prof. dr Dragana Cvetkovića, i na tome
mu neizmerno hvala.
PB  - Univerzitet u Beogradu, Mašinski fakultet
T2  - Univerzitet u Beogradu, Mašinski fakultet
T1  - Mašinski materijali 2
UR  - https://hdl.handle.net/21.15107/rcub_machinery_6326
ER  - 

@book{
author = "Prokić Cvetković, Radica and Popović, Olivera and Bakić, Gordana and Đukić, Miloš",
year = "2021",
abstract = "Predgovor
Predmeti koji nas okružuju izrađeni su od različitih vrsta materijala, pa je poznavanje njihovih
osobina, načina proizvodnje, postojanosti u radnom okruženju, mogućnosti nabavke
i cene od velikog značaja pri izboru materijala za konkretnu namenu. Tendencije savremenog
načina života su usmerene ka smanjenju potrošnje energije i zaštite životne sredine, pa
se pred inženjere, projektante i konstruktore postavljaju zahtevi da izaberu materijal koji
ima što manju cenu i masu uz istovremeno zadovoljavajuće fizičke, hemijske, mehaničke,
tehnološke ili neke specifične osobine. U svetu se dosta novca ulaže u istraživačke i razvojne
projekte za razvoj novih materijala ili modifikaciju osobina postojećih materijala.
Ovaj udžbenik je namenjen studentima Osnovnih akademskih studija koji slušaju predmet
Mašinski materijali 2 sa fondom časova 5 u trećem semestru na Mašinskom fakultetu
Univerziteta u Beogradu. Gradivo u ovom udžbeniku prati kontinuitet gradiva izloženog
u knjizi Mašinski materijali 1, pa je za praćenje nastave iz predmeta Mašinski materijali 2
neophodno predznanje iz tog predmeta. Cilj autora je bio da ovako složenu problematiku
što jednostavnije prikažu, a da se pri tome održi odgovarajući akademski nivo. Uvek, kada
je to bilo moguće, autori su se potrudili da odgovarajuće objašnjenje ilustruju dobrom
slikom.
Plan i program predmeta Mašinski materijali 2 se sastoji iz dve celine i to: metalni materijali
i postupci spajanja materijala zavarivanjem i lemljenjem.
U prvom delu udžbenika opisani su metalni materijali, njihov način dobijanja, kao i fizička,
hemijska i mehanička svojstva. Od metalnih materijala najviše pažnje je posvećeno
železu i njegovim legurama jer su to još uvek najzastupljeniji konstrukcioni materijali u
mašinstvu. Železo gradi dve grupe legura: čelike i gvožđa; pa je opisan način njihovog
dobijanja, mehaničke i fizičke osobine, kao i njihovo označavanje po najnovijem standardu.
Takođe su opisane neravnotežne transformacije pri hlađenju čelika, kao i termička,
termomehanička i termohemijska obrada. U nastavku je dosta pažnje posvećeno aluminijumu
i njegovim legurama, jer su oni po zastupljenosti odmah posle čelika. Bakar, nikl,
titan i drugi obojeni metali su takođe prikazani.
U drugom delu udžbenika dati su osnovni pojmovi u zavarivanju i opisani su konvencionalni
postupci zavarivanja. Takođe su prikazana ispitivanja zavarenih spojeva metodama sa razaranjem
i bez razaranja, greške u zavarenim spojevima i nivoi kvaliteta zavarenih spojeva.
Kao postupak spajanja materijala, pored zavarivanja, može da se koristi i lemljenje,
pa su na kraju opisani njegovi osnovni principi.
Na kraju knjige navedena je literatura koja može da se koristi u cilju proširenja znanja iz
ovih oblasti.
Autori se zahvaljuju recenzentima, dr Nenadu Radoviću, redovnom profesoru Tehnološkometalurškog
fakulteta Univerziteta u Beogradu i dr Aleksandru Sedmaku, profesoru emeritus
Mašinskog fakulteta Univerziteta u Beogradu, koji su svojim korisnim predlozima
i sugestijama doprineli poboljšanju kvaliteta knjige. Takođe se zahvaljujemo i kolegama
iz laboratorije "KonMat" koji su nam ustupili slike iz IBR-a, kao i kolegi dr Radovanu
Puzoviću, profesoru Mašinskog fakulteta, na nesebičnoj pomoći.
I na kraju, ne kao manje važno, želimo da istaknemo da ova knjiga sigurno na bi ovako
izgledala da nije bilo ogromnog truda i strpljenja prof. dr Dragana Cvetkovića, i na tome
mu neizmerno hvala.",
publisher = "Univerzitet u Beogradu, Mašinski fakultet",
journal = "Univerzitet u Beogradu, Mašinski fakultet",
title = "Mašinski materijali 2",
url = "https://hdl.handle.net/21.15107/rcub_machinery_6326"
}

Prokić Cvetković, R., Popović, O., Bakić, G.,& Đukić, M.. (2021). Mašinski materijali 2. in Univerzitet u Beogradu, Mašinski fakultet
Univerzitet u Beogradu, Mašinski fakultet..
https://hdl.handle.net/21.15107/rcub_machinery_6326

Prokić Cvetković R, Popović O, Bakić G, Đukić M. Mašinski materijali 2. in Univerzitet u Beogradu, Mašinski fakultet. 2021;.
https://hdl.handle.net/21.15107/rcub_machinery_6326 .

Prokić Cvetković, Radica, Popović, Olivera, Bakić, Gordana, Đukić, Miloš, "Mašinski materijali 2" in Univerzitet u Beogradu, Mašinski fakultet (2021),
https://hdl.handle.net/21.15107/rcub_machinery_6326 .

TY  - CONF
AU  - Bakić, Gordana
AU  - Peruničić, Vesna
AU  - Gajić, Ivan
AU  - Bezmarević, Savo
AU  - Đukić, Miloš
AU  - Rajičić, Bratislav
AU  - Maslarević, Aleksandar
PY  - 2021
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/4290
AB  - Nabavka visoko vrednih delova termoenergetskih postrojenja, kao što su komponente parovoda sveže pare koje su izložene najvišim radnim parametrima tokom rada postrojenja, podrazumeva definisanje vrlo preciznih zahteva za isporuku delova opreme. Kada postoje precizni zahtevi za gotov proizvod, ispručioci moraju strogo da kontrolišu parametre proizvodnje delova. Značaj svakog od zahteva često promiče tehničkim licima, i onima koji nabavljaju i onima koji isporučuju opremu, posebno ako zahtevi nisu sadržani u standardima, već proističu iz saznanja koja su domen usko specijalizovanih naučnih oblasti. U ovom radu je na primeru komponenti parovoda sveže pare izrađenih od čelika X10CrMoVNb91 koje su isporučene sa nehomogenim i u nekom delu sniženim osobinama prikazan značaj kako ulazne kontrole, tako i poštovanja svakog od tehničkih zahteva. Takođe, ponuđeno je i rešenje šta raditi sa takvom opremom i ocenjeno je koliko dugo bi ona mogla bezbedno da radi sa nižim osobinama.
AB  - Procurement of highly valuable parts of thermal power plants, such as fresh steam pipeline components that are exposed to the highest operating parameters during the operation of the plant, implies defining very precise requirements for the delivery of equipment parts. When there are precise requirements for the finished product, the producers need to obtained strictly control of the production parameters. The importance of each of the requirements is often oversighted by technical persons, both those who procure and those who supply equipment, especially if the requirements are not contained in the standards, but derive from knowledge that is the domain of narrowly specialized scientific fields. In this paper, the importance of both input control and compliance with each of the technical requirements is shown on the example of fresh steam steam pipe components made of X10CrMoVNb91 steel that are delivered with inhomogeneous and in some parts reduced properties. Also, a solution was offered on what to do with such equipment and it was assessed how long it could work safely with lower properties.
PB  - Belgrade : Society of Thermal Engineers of Serbia
C3  - Full Papers Proceedings of International Conference "Power Plants 2021" November 17-18TH, 2021, Belgrade, Serbia
T1  - Eksploataciona upotrebljivost materijala X10CrMoVNb91 sa nižim osobinama od onih zahtevanih standardomi značaj tehničkih zahteva
T1  - Serviceability of X10CrMoVNb91 material with lower properties than required by standard and the importance of technical delivery requirements
UR  - https://hdl.handle.net/21.15107/rcub_machinery_4290
ER  - 

@conference{
author = "Bakić, Gordana and Peruničić, Vesna and Gajić, Ivan and Bezmarević, Savo and Đukić, Miloš and Rajičić, Bratislav and Maslarević, Aleksandar",
year = "2021",
abstract = "Nabavka visoko vrednih delova termoenergetskih postrojenja, kao što su komponente parovoda sveže pare koje su izložene najvišim radnim parametrima tokom rada postrojenja, podrazumeva definisanje vrlo preciznih zahteva za isporuku delova opreme. Kada postoje precizni zahtevi za gotov proizvod, ispručioci moraju strogo da kontrolišu parametre proizvodnje delova. Značaj svakog od zahteva često promiče tehničkim licima, i onima koji nabavljaju i onima koji isporučuju opremu, posebno ako zahtevi nisu sadržani u standardima, već proističu iz saznanja koja su domen usko specijalizovanih naučnih oblasti. U ovom radu je na primeru komponenti parovoda sveže pare izrađenih od čelika X10CrMoVNb91 koje su isporučene sa nehomogenim i u nekom delu sniženim osobinama prikazan značaj kako ulazne kontrole, tako i poštovanja svakog od tehničkih zahteva. Takođe, ponuđeno je i rešenje šta raditi sa takvom opremom i ocenjeno je koliko dugo bi ona mogla bezbedno da radi sa nižim osobinama., Procurement of highly valuable parts of thermal power plants, such as fresh steam pipeline components that are exposed to the highest operating parameters during the operation of the plant, implies defining very precise requirements for the delivery of equipment parts. When there are precise requirements for the finished product, the producers need to obtained strictly control of the production parameters. The importance of each of the requirements is often oversighted by technical persons, both those who procure and those who supply equipment, especially if the requirements are not contained in the standards, but derive from knowledge that is the domain of narrowly specialized scientific fields. In this paper, the importance of both input control and compliance with each of the technical requirements is shown on the example of fresh steam steam pipe components made of X10CrMoVNb91 steel that are delivered with inhomogeneous and in some parts reduced properties. Also, a solution was offered on what to do with such equipment and it was assessed how long it could work safely with lower properties.",
publisher = "Belgrade : Society of Thermal Engineers of Serbia",
journal = "Full Papers Proceedings of International Conference "Power Plants 2021" November 17-18TH, 2021, Belgrade, Serbia",
title = "Eksploataciona upotrebljivost materijala X10CrMoVNb91 sa nižim osobinama od onih zahtevanih standardomi značaj tehničkih zahteva, Serviceability of X10CrMoVNb91 material with lower properties than required by standard and the importance of technical delivery requirements",
url = "https://hdl.handle.net/21.15107/rcub_machinery_4290"
}

Bakić, G., Peruničić, V., Gajić, I., Bezmarević, S., Đukić, M., Rajičić, B.,& Maslarević, A.. (2021). Eksploataciona upotrebljivost materijala X10CrMoVNb91 sa nižim osobinama od onih zahtevanih standardomi značaj tehničkih zahteva. in Full Papers Proceedings of International Conference "Power Plants 2021" November 17-18TH, 2021, Belgrade, Serbia
Belgrade : Society of Thermal Engineers of Serbia..
https://hdl.handle.net/21.15107/rcub_machinery_4290

Bakić G, Peruničić V, Gajić I, Bezmarević S, Đukić M, Rajičić B, Maslarević A. Eksploataciona upotrebljivost materijala X10CrMoVNb91 sa nižim osobinama od onih zahtevanih standardomi značaj tehničkih zahteva. in Full Papers Proceedings of International Conference "Power Plants 2021" November 17-18TH, 2021, Belgrade, Serbia. 2021;.
https://hdl.handle.net/21.15107/rcub_machinery_4290 .

Bakić, Gordana, Peruničić, Vesna, Gajić, Ivan, Bezmarević, Savo, Đukić, Miloš, Rajičić, Bratislav, Maslarević, Aleksandar, "Eksploataciona upotrebljivost materijala X10CrMoVNb91 sa nižim osobinama od onih zahtevanih standardomi značaj tehničkih zahteva" in Full Papers Proceedings of International Conference "Power Plants 2021" November 17-18TH, 2021, Belgrade, Serbia (2021),
https://hdl.handle.net/21.15107/rcub_machinery_4290 .

TY  - JOUR
AU  - Đukić, Miloš
AU  - Curtin, William A.
AU  - Zhang, Zhiliang
AU  - Sedmak, Aleksandar
PY  - 2021
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3539
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - Engineering Fracture Mechanics
T1  - Recent Advances on Hydrogen Embrittlement Understanding and Future Research Framework, Editorial
VL  - 241
DO  - 10.1016/j.engfracmech.2020.107439
ER  - 

@article{
author = "Đukić, Miloš and Curtin, William A. and Zhang, Zhiliang and Sedmak, Aleksandar",
year = "2021",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "Engineering Fracture Mechanics",
title = "Recent Advances on Hydrogen Embrittlement Understanding and Future Research Framework, Editorial",
volume = "241",
doi = "10.1016/j.engfracmech.2020.107439"
}

Đukić, M., Curtin, W. A., Zhang, Z.,& Sedmak, A.. (2021). Recent Advances on Hydrogen Embrittlement Understanding and Future Research Framework, Editorial. in Engineering Fracture Mechanics
Pergamon-Elsevier Science Ltd, Oxford., 241.
https://doi.org/10.1016/j.engfracmech.2020.107439

Đukić M, Curtin WA, Zhang Z, Sedmak A. Recent Advances on Hydrogen Embrittlement Understanding and Future Research Framework, Editorial. in Engineering Fracture Mechanics. 2021;241.
doi:10.1016/j.engfracmech.2020.107439 .

Đukić, Miloš, Curtin, William A., Zhang, Zhiliang, Sedmak, Aleksandar, "Recent Advances on Hydrogen Embrittlement Understanding and Future Research Framework, Editorial" in Engineering Fracture Mechanics, 241 (2021),
https://doi.org/10.1016/j.engfracmech.2020.107439 . .

TY  - JOUR
AU  - Muthanna, Bassam Gamal Nasser
AU  - Bouledroua, Omar
AU  - Meriem-Benziane, Madjid
AU  - Setvati, Mahdi Razavi
AU  - Đukić, Miloš
PY  - 2021
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3943
AB  - Pipe elbows (bends) are considered critical pressurized components in the piping systems and pipelines due to their stress intensification and the effect of bend curvature. They are prone and hence more exposed to different corrosion failure modes than straight pipes. Late detection of such elbow damages can lead to different dangerous and emergency situations which cause environmental disasters, pollution, substantial consumer losses and a serious threat to human life. A comprehensive safety and reliability assessment of pipe elbows, including usage of prediction models, can provide significant increases in the service life of pipelines. It is well known that the limit pressure is an important parameter to assess the piping integrity. In this paper, the integrity assessment of damaged pipeline elbows made of API 5L X52 steel was done within the framework of numerical modeling using the finite element method (FEM) and finite element analysis (FEA). The evaluation of numerically FEM modeled limit pressure in the corroded elbow containing a rectangular parallelepiped-shaped corrosion defect with rounded corners at the intrados section was done and compared to different codes for calculating limit pressure. Moreover, the area with the corrosion defects with different relative defect depth to wall thickness ratios was FEM modeled at the intrados section of the pipe elbow where the highest hoop stress exists. The results showed that the codes for straight pipes could not be applied for the pipe elbows due to the significantly higher error in the obtained limit pressure value compared with numerically FEM obtained results. However, the results for modified codes, adapted for the pipe elbow case using the Goodall formula for calculation of the hoop stress in pipe elbows with defects are pretty consistent with the numerical FEA results. The notch failure assessment diagram (NFAD) was also used for the straight pipe and pipe bends with different corrosion defect depth ratios, while the obtained critical defect depth ratios further highlighted the criticality of pipe elbows as an essential pipeline component.
PB  - Elsevier Sci Ltd, Oxford
T2  - International Journal of Pressure Vessels and Piping
T1  - Assessment of corroded API 5L X52 pipe elbow using a modified failure assessment diagram
VL  - 190
DO  - 10.1016/j.ijpvp.2020.104291
ER  - 

@article{
author = "Muthanna, Bassam Gamal Nasser and Bouledroua, Omar and Meriem-Benziane, Madjid and Setvati, Mahdi Razavi and Đukić, Miloš",
year = "2021",
abstract = "Pipe elbows (bends) are considered critical pressurized components in the piping systems and pipelines due to their stress intensification and the effect of bend curvature. They are prone and hence more exposed to different corrosion failure modes than straight pipes. Late detection of such elbow damages can lead to different dangerous and emergency situations which cause environmental disasters, pollution, substantial consumer losses and a serious threat to human life. A comprehensive safety and reliability assessment of pipe elbows, including usage of prediction models, can provide significant increases in the service life of pipelines. It is well known that the limit pressure is an important parameter to assess the piping integrity. In this paper, the integrity assessment of damaged pipeline elbows made of API 5L X52 steel was done within the framework of numerical modeling using the finite element method (FEM) and finite element analysis (FEA). The evaluation of numerically FEM modeled limit pressure in the corroded elbow containing a rectangular parallelepiped-shaped corrosion defect with rounded corners at the intrados section was done and compared to different codes for calculating limit pressure. Moreover, the area with the corrosion defects with different relative defect depth to wall thickness ratios was FEM modeled at the intrados section of the pipe elbow where the highest hoop stress exists. The results showed that the codes for straight pipes could not be applied for the pipe elbows due to the significantly higher error in the obtained limit pressure value compared with numerically FEM obtained results. However, the results for modified codes, adapted for the pipe elbow case using the Goodall formula for calculation of the hoop stress in pipe elbows with defects are pretty consistent with the numerical FEA results. The notch failure assessment diagram (NFAD) was also used for the straight pipe and pipe bends with different corrosion defect depth ratios, while the obtained critical defect depth ratios further highlighted the criticality of pipe elbows as an essential pipeline component.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "International Journal of Pressure Vessels and Piping",
title = "Assessment of corroded API 5L X52 pipe elbow using a modified failure assessment diagram",
volume = "190",
doi = "10.1016/j.ijpvp.2020.104291"
}

Muthanna, B. G. N., Bouledroua, O., Meriem-Benziane, M., Setvati, M. R.,& Đukić, M.. (2021). Assessment of corroded API 5L X52 pipe elbow using a modified failure assessment diagram. in International Journal of Pressure Vessels and Piping
Elsevier Sci Ltd, Oxford., 190.
https://doi.org/10.1016/j.ijpvp.2020.104291

Muthanna BGN, Bouledroua O, Meriem-Benziane M, Setvati MR, Đukić M. Assessment of corroded API 5L X52 pipe elbow using a modified failure assessment diagram. in International Journal of Pressure Vessels and Piping. 2021;190.
doi:10.1016/j.ijpvp.2020.104291 .

Muthanna, Bassam Gamal Nasser, Bouledroua, Omar, Meriem-Benziane, Madjid, Setvati, Mahdi Razavi, Đukić, Miloš, "Assessment of corroded API 5L X52 pipe elbow using a modified failure assessment diagram" in International Journal of Pressure Vessels and Piping, 190 (2021),
https://doi.org/10.1016/j.ijpvp.2020.104291 . .

TY  - JOUR
AU  - Wasim, Muhammad
AU  - Đukić, Miloš
AU  - Ngo, Tuan Duc
PY  - 2021
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3620
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - Engineering Failure Analysis
T1  - Influence of hydrogen-enhanced plasticity and decohesion mechanisms of hydrogen embrittlement on the fracture resistance of steel (vol 123, 105312, 2021)
VL  - 124
DO  - 10.1016/j.engfailanal.2021.105370
ER  - 

@article{
author = "Wasim, Muhammad and Đukić, Miloš and Ngo, Tuan Duc",
year = "2021",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "Engineering Failure Analysis",
title = "Influence of hydrogen-enhanced plasticity and decohesion mechanisms of hydrogen embrittlement on the fracture resistance of steel (vol 123, 105312, 2021)",
volume = "124",
doi = "10.1016/j.engfailanal.2021.105370"
}

Wasim, M., Đukić, M.,& Ngo, T. D.. (2021). Influence of hydrogen-enhanced plasticity and decohesion mechanisms of hydrogen embrittlement on the fracture resistance of steel (vol 123, 105312, 2021). in Engineering Failure Analysis
Pergamon-Elsevier Science Ltd, Oxford., 124.
https://doi.org/10.1016/j.engfailanal.2021.105370

Wasim M, Đukić M, Ngo TD. Influence of hydrogen-enhanced plasticity and decohesion mechanisms of hydrogen embrittlement on the fracture resistance of steel (vol 123, 105312, 2021). in Engineering Failure Analysis. 2021;124.
doi:10.1016/j.engfailanal.2021.105370 .

Wasim, Muhammad, Đukić, Miloš, Ngo, Tuan Duc, "Influence of hydrogen-enhanced plasticity and decohesion mechanisms of hydrogen embrittlement on the fracture resistance of steel (vol 123, 105312, 2021)" in Engineering Failure Analysis, 124 (2021),
https://doi.org/10.1016/j.engfailanal.2021.105370 . .

TY  - JOUR
AU  - Wasim, Muhammad
AU  - Đukić, Miloš
PY  - 2021
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3607
AB  - Corrosion induced failure of buried ferrous pipelines causes significant economic losses to the world. Many of the existing buried water pipelines are made of ductile iron in most of the developed countries. Literature shows that the research on the corrosion-induced degradation assessments of ductile iron pipelines is limited and mostly deals with the physical deterioration i. e., loss of wall thickness determined by short-term research. This paper addresses this gap and presents a comparatively long-term study on the corrosion and its subsequent effect on the composition and nanomechanical properties of buried ductile iron pipelines in the accelerated corrosive environment. For experimentation, ductile iron specimens were immersed in the acidic simulated soil solution for 365 days. Physical deterioration assessment over the time was carried out in terms of corrosion rates measured at intervals of 180 and 365 days. A significant change in the percentage composition of key elements and phases were quantified. Furthermore, the mechanical properties of the grains were found to be considerably reduced after 365 days of immersion in the acidic environment by the nanoindentation technique. The results revealed an alarming increase of structural degradation at nano scale for some of the grains due to chloride induced localised corrosion. The significance of the current research is its in-depth analysis of the corrosion-induced degradation of ductile iron pipes which enhances the knowledge related to the failure of these pipelines.
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - Engineering Failure Analysis
T1  - Corrosion induced failure of the ductile iron pipes at micro- and nano-levels
VL  - 121
DO  - 10.1016/j.engfailanal.2020.105169
ER  - 

@article{
author = "Wasim, Muhammad and Đukić, Miloš",
year = "2021",
abstract = "Corrosion induced failure of buried ferrous pipelines causes significant economic losses to the world. Many of the existing buried water pipelines are made of ductile iron in most of the developed countries. Literature shows that the research on the corrosion-induced degradation assessments of ductile iron pipelines is limited and mostly deals with the physical deterioration i. e., loss of wall thickness determined by short-term research. This paper addresses this gap and presents a comparatively long-term study on the corrosion and its subsequent effect on the composition and nanomechanical properties of buried ductile iron pipelines in the accelerated corrosive environment. For experimentation, ductile iron specimens were immersed in the acidic simulated soil solution for 365 days. Physical deterioration assessment over the time was carried out in terms of corrosion rates measured at intervals of 180 and 365 days. A significant change in the percentage composition of key elements and phases were quantified. Furthermore, the mechanical properties of the grains were found to be considerably reduced after 365 days of immersion in the acidic environment by the nanoindentation technique. The results revealed an alarming increase of structural degradation at nano scale for some of the grains due to chloride induced localised corrosion. The significance of the current research is its in-depth analysis of the corrosion-induced degradation of ductile iron pipes which enhances the knowledge related to the failure of these pipelines.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "Engineering Failure Analysis",
title = "Corrosion induced failure of the ductile iron pipes at micro- and nano-levels",
volume = "121",
doi = "10.1016/j.engfailanal.2020.105169"
}

Wasim, M.,& Đukić, M.. (2021). Corrosion induced failure of the ductile iron pipes at micro- and nano-levels. in Engineering Failure Analysis
Pergamon-Elsevier Science Ltd, Oxford., 121.
https://doi.org/10.1016/j.engfailanal.2020.105169

Wasim M, Đukić M. Corrosion induced failure of the ductile iron pipes at micro- and nano-levels. in Engineering Failure Analysis. 2021;121.
doi:10.1016/j.engfailanal.2020.105169 .

Wasim, Muhammad, Đukić, Miloš, "Corrosion induced failure of the ductile iron pipes at micro- and nano-levels" in Engineering Failure Analysis, 121 (2021),
https://doi.org/10.1016/j.engfailanal.2020.105169 . .

TY  - JOUR
AU  - Wasim, Muhammad
AU  - Đukić, Miloš
AU  - Tuan Duc Ngo
PY  - 2021
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3499
AB  - Hydrogen gas is a renewable energy source for electrical and transportation fuel for vehicular applications. However, the storage and transportation of hydrogen gas are challenging because of its very nature and impact on pipelines and storage tank/facility materials. This paper investigates the influence of hydrogen on the candidate fracture toughness (K-Q) of low carbon steel immersed in acidic hydrogen environments for one year which has limited previous research. Steel specimens were coated from all sides except one surface to accurately quantify the influence of hydrogen diffusing from the environments into the specimens. Specimens were tested for crack tip opening displacement (CTOD) fracture toughness at six- and twelve-month intervals of immersion in acidic environments. Before K-Q testing at various intervals, the hydrogen contents of the specimens were determined by an electrochemical approach. Based on test results, models for the degradation of K-Q of steel were developed in accordance with the proposed hydrogen-enhanced localized plasticity (HELP) and hydrogen-enhanced decohesion (HEDE) model (HELP + HEDE model) of hydrogen embrittlement. Furthermore, fractography of the specimens was performed to observe the synergistic action of HELP and HEDE mechanisms (HE), and their subsequent effects on the microstructure and fracture resistance of steel. The significance of the research is highlighted by its practical application for assessing the durability of steel structures and infrastructure against hydrogen environmental assisted cracking (HEAC). Furthermore, this paper highlights the synergistic activity of HELP and HEDE mechanisms of HE in steel and the importance of developing structures for storing hydrogen on a large scale.
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - Engineering Failure Analysis
T1  - Influence of hydrogen-enhanced plasticity and decohesion mechanisms of hydrogen embrittlement on the fracture resistance of steel
VL  - 123
DO  - 10.1016/engfailanal.2021.105312
ER  - 

@article{
author = "Wasim, Muhammad and Đukić, Miloš and Tuan Duc Ngo",
year = "2021",
abstract = "Hydrogen gas is a renewable energy source for electrical and transportation fuel for vehicular applications. However, the storage and transportation of hydrogen gas are challenging because of its very nature and impact on pipelines and storage tank/facility materials. This paper investigates the influence of hydrogen on the candidate fracture toughness (K-Q) of low carbon steel immersed in acidic hydrogen environments for one year which has limited previous research. Steel specimens were coated from all sides except one surface to accurately quantify the influence of hydrogen diffusing from the environments into the specimens. Specimens were tested for crack tip opening displacement (CTOD) fracture toughness at six- and twelve-month intervals of immersion in acidic environments. Before K-Q testing at various intervals, the hydrogen contents of the specimens were determined by an electrochemical approach. Based on test results, models for the degradation of K-Q of steel were developed in accordance with the proposed hydrogen-enhanced localized plasticity (HELP) and hydrogen-enhanced decohesion (HEDE) model (HELP + HEDE model) of hydrogen embrittlement. Furthermore, fractography of the specimens was performed to observe the synergistic action of HELP and HEDE mechanisms (HE), and their subsequent effects on the microstructure and fracture resistance of steel. The significance of the research is highlighted by its practical application for assessing the durability of steel structures and infrastructure against hydrogen environmental assisted cracking (HEAC). Furthermore, this paper highlights the synergistic activity of HELP and HEDE mechanisms of HE in steel and the importance of developing structures for storing hydrogen on a large scale.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "Engineering Failure Analysis",
title = "Influence of hydrogen-enhanced plasticity and decohesion mechanisms of hydrogen embrittlement on the fracture resistance of steel",
volume = "123",
doi = "10.1016/engfailanal.2021.105312"
}

Wasim, M., Đukić, M.,& Tuan Duc Ngo. (2021). Influence of hydrogen-enhanced plasticity and decohesion mechanisms of hydrogen embrittlement on the fracture resistance of steel. in Engineering Failure Analysis
Pergamon-Elsevier Science Ltd, Oxford., 123.
https://doi.org/10.1016/engfailanal.2021.105312

Wasim M, Đukić M, Tuan Duc Ngo. Influence of hydrogen-enhanced plasticity and decohesion mechanisms of hydrogen embrittlement on the fracture resistance of steel. in Engineering Failure Analysis. 2021;123.
doi:10.1016/engfailanal.2021.105312 .

Wasim, Muhammad, Đukić, Miloš, Tuan Duc Ngo, "Influence of hydrogen-enhanced plasticity and decohesion mechanisms of hydrogen embrittlement on the fracture resistance of steel" in Engineering Failure Analysis, 123 (2021),
https://doi.org/10.1016/engfailanal.2021.105312 . .

TY  - JOUR
AU  - Wasim, Muhammad
AU  - Đukić, Miloš
PY  - 2020
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3277
AB  - This paper aims to investigate the effect of hydrogen-induced mechanical degradation of low carbon steel at macro-, micro- and nano-levels in the hydrogen-rich acidic environments. From the test results of specimens, a relationship in hydrogen concentration and corrosion propagation was observed that led to the significant reductions of bulk elastic modulus after 28 days of exposure to the hydrogen-rich acidic environments. Through microstructural analysis, the deformation of larger grains, cracks, and blisters caused by hydrogen penetration was found as the possible cause for this reduction. Moreover, by performing nanoindentation on the areas of interest of various specimens at planned time periods, the influence of hydrogen on the nano-elastic and nano-hardness properties of grains was determined. The 3D surface profiles of the nano-elastic modulus and nano hardness of various specimens are presented in this paper.
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - International Journal of Hydrogen Energy
T1  - Hydrogen embrittlement of low carbon structural steel at macro-, micro- and nano-levels
EP  - 2156
IS  - 3
SP  - 2145
VL  - 45
DO  - 10.1016/j.ijhydene.2019.11.070
ER  - 

@article{
author = "Wasim, Muhammad and Đukić, Miloš",
year = "2020",
abstract = "This paper aims to investigate the effect of hydrogen-induced mechanical degradation of low carbon steel at macro-, micro- and nano-levels in the hydrogen-rich acidic environments. From the test results of specimens, a relationship in hydrogen concentration and corrosion propagation was observed that led to the significant reductions of bulk elastic modulus after 28 days of exposure to the hydrogen-rich acidic environments. Through microstructural analysis, the deformation of larger grains, cracks, and blisters caused by hydrogen penetration was found as the possible cause for this reduction. Moreover, by performing nanoindentation on the areas of interest of various specimens at planned time periods, the influence of hydrogen on the nano-elastic and nano-hardness properties of grains was determined. The 3D surface profiles of the nano-elastic modulus and nano hardness of various specimens are presented in this paper.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "International Journal of Hydrogen Energy",
title = "Hydrogen embrittlement of low carbon structural steel at macro-, micro- and nano-levels",
pages = "2156-2145",
number = "3",
volume = "45",
doi = "10.1016/j.ijhydene.2019.11.070"
}

Wasim, M.,& Đukić, M.. (2020). Hydrogen embrittlement of low carbon structural steel at macro-, micro- and nano-levels. in International Journal of Hydrogen Energy
Pergamon-Elsevier Science Ltd, Oxford., 45(3), 2145-2156.
https://doi.org/10.1016/j.ijhydene.2019.11.070

Wasim M, Đukić M. Hydrogen embrittlement of low carbon structural steel at macro-, micro- and nano-levels. in International Journal of Hydrogen Energy. 2020;45(3):2145-2156.
doi:10.1016/j.ijhydene.2019.11.070 .

Wasim, Muhammad, Đukić, Miloš, "Hydrogen embrittlement of low carbon structural steel at macro-, micro- and nano-levels" in International Journal of Hydrogen Energy, 45, no. 3 (2020):2145-2156,
https://doi.org/10.1016/j.ijhydene.2019.11.070 . .

TY  - PAT
AU  - Maslarević, Aleksandar
AU  - Bakić, Gordana
AU  - Đukić, Miloš
AU  - Rajičić, Bratislav
AU  - Mitrović, Nenad
PY  - 2020
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/4375
T1  - Uređaj za eroziono ispitivanje materijala čvrstim česticama
UR  - https://hdl.handle.net/21.15107/rcub_machinery_4375
ER  - 

@misc{
author = "Maslarević, Aleksandar and Bakić, Gordana and Đukić, Miloš and Rajičić, Bratislav and Mitrović, Nenad",
year = "2020",
title = "Uređaj za eroziono ispitivanje materijala čvrstim česticama",
url = "https://hdl.handle.net/21.15107/rcub_machinery_4375"
}

Maslarević, A., Bakić, G., Đukić, M., Rajičić, B.,& Mitrović, N.. (2020). Uređaj za eroziono ispitivanje materijala čvrstim česticama. .
https://hdl.handle.net/21.15107/rcub_machinery_4375

Maslarević A, Bakić G, Đukić M, Rajičić B, Mitrović N. Uređaj za eroziono ispitivanje materijala čvrstim česticama. 2020;.
https://hdl.handle.net/21.15107/rcub_machinery_4375 .

Maslarević, Aleksandar, Bakić, Gordana, Đukić, Miloš, Rajičić, Bratislav, Mitrović, Nenad, "Uređaj za eroziono ispitivanje materijala čvrstim česticama" (2020),
https://hdl.handle.net/21.15107/rcub_machinery_4375 .

TY  - JOUR
AU  - Wasim, Muhammad
AU  - Đukić, Miloš
PY  - 2020
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3413
AB  - This paper presents the long-term effect of sulfate-reducing bacteria (SRB) on the corrosion of buried cast iron pipes in soil and culture medium which has no previous research in literature. The comprehensive experimental design for investigating the external corrosion of buried pipes in soil and culture medium is developed in the current research. Coated specimens except their one side simulating the exterior surface of buried pipes are exposed to the SRB for 365 days in both the media. From the test results of corrosion rates and maximum pit depth, significant microbiologically influenced corrosion (MIC) of cast iron in the soil is observed as compared to the culture medium. The test results suggest that the testing of specimens in simulated soil so-lutions or culture medium instead of natural soil may lead to underestimated corrosion mea-surements for the buried pipe. The findings of this paper have practical applications for the prediction of failure of buried cast iron pipelines.
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - Engineering Failure Analysis
T1  - Long-term external microbiologically influenced corrosion of buried cast iron pipes in the presence of sulfate-reducing bacteria (SRB)
VL  - 115
DO  - 10.1016/j.engfailanal.2020.104657
ER  - 

@article{
author = "Wasim, Muhammad and Đukić, Miloš",
year = "2020",
abstract = "This paper presents the long-term effect of sulfate-reducing bacteria (SRB) on the corrosion of buried cast iron pipes in soil and culture medium which has no previous research in literature. The comprehensive experimental design for investigating the external corrosion of buried pipes in soil and culture medium is developed in the current research. Coated specimens except their one side simulating the exterior surface of buried pipes are exposed to the SRB for 365 days in both the media. From the test results of corrosion rates and maximum pit depth, significant microbiologically influenced corrosion (MIC) of cast iron in the soil is observed as compared to the culture medium. The test results suggest that the testing of specimens in simulated soil so-lutions or culture medium instead of natural soil may lead to underestimated corrosion mea-surements for the buried pipe. The findings of this paper have practical applications for the prediction of failure of buried cast iron pipelines.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "Engineering Failure Analysis",
title = "Long-term external microbiologically influenced corrosion of buried cast iron pipes in the presence of sulfate-reducing bacteria (SRB)",
volume = "115",
doi = "10.1016/j.engfailanal.2020.104657"
}

Wasim, M.,& Đukić, M.. (2020). Long-term external microbiologically influenced corrosion of buried cast iron pipes in the presence of sulfate-reducing bacteria (SRB). in Engineering Failure Analysis
Pergamon-Elsevier Science Ltd, Oxford., 115.
https://doi.org/10.1016/j.engfailanal.2020.104657

Wasim M, Đukić M. Long-term external microbiologically influenced corrosion of buried cast iron pipes in the presence of sulfate-reducing bacteria (SRB). in Engineering Failure Analysis. 2020;115.
doi:10.1016/j.engfailanal.2020.104657 .

Wasim, Muhammad, Đukić, Miloš, "Long-term external microbiologically influenced corrosion of buried cast iron pipes in the presence of sulfate-reducing bacteria (SRB)" in Engineering Failure Analysis, 115 (2020),
https://doi.org/10.1016/j.engfailanal.2020.104657 . .

TY  - JOUR
AU  - Zelmati, Djamel
AU  - Bouledroua, Omar
AU  - Hafsi, Zahreddine
AU  - Đukić, Miloš
PY  - 2020
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3411
AB  - A methodology is developed in this paper to estimate the time-dependent reliability of a pipeline in Algeria, which is in exploitation from 1981 and with internal and external localized corrosion defects detected in 2009. A probabilistic approach was applied to a pipeline made of API 5L X60 steel for the long-distance transportation of natural gas (55 km), which crossing several geo-graphical reliefs in different country areas. The analysis was carried out by taking into con-sideration the potential stochastic variables altering drastically the reliability of the pipeline, i.e., dimensions of the localized corrosion defects, their locations, and distribution, and the corrosion rate. The correlations between the pipeline spatial corrosion defects distribution and their di-mensions, obtained by using an intelligent inspection tool are used to analyze the actual in-service corrosion attack rate and for enhancement of the accuracy of the reliability assessment. The failure scenario was considered as the moment when the pipeline operating pressure exceeds the failure pressure defined analytically in accordance with different commonly used standards. The assessment of the reliability index of the corroded pipeline subjected to internal pressure and the failure probability was done. The detailed reliability analysis is carried out by using the second order reliability method (SORM) for the basic random variables with different prob-abilistic density within a nonlinear limit state function. The latter is based on the limit analysis of the failure pressure model for different standards and the numerical analysis using the finite element method and ANSYS software.
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - Engineering Failure Analysis
T1  - Probabilistic analysis of corroded pipeline under localized corrosion defects based on the intelligent inspection tool
VL  - 115
DO  - 10.1016/j.engfailanal.2020.104683
ER  - 

@article{
author = "Zelmati, Djamel and Bouledroua, Omar and Hafsi, Zahreddine and Đukić, Miloš",
year = "2020",
abstract = "A methodology is developed in this paper to estimate the time-dependent reliability of a pipeline in Algeria, which is in exploitation from 1981 and with internal and external localized corrosion defects detected in 2009. A probabilistic approach was applied to a pipeline made of API 5L X60 steel for the long-distance transportation of natural gas (55 km), which crossing several geo-graphical reliefs in different country areas. The analysis was carried out by taking into con-sideration the potential stochastic variables altering drastically the reliability of the pipeline, i.e., dimensions of the localized corrosion defects, their locations, and distribution, and the corrosion rate. The correlations between the pipeline spatial corrosion defects distribution and their di-mensions, obtained by using an intelligent inspection tool are used to analyze the actual in-service corrosion attack rate and for enhancement of the accuracy of the reliability assessment. The failure scenario was considered as the moment when the pipeline operating pressure exceeds the failure pressure defined analytically in accordance with different commonly used standards. The assessment of the reliability index of the corroded pipeline subjected to internal pressure and the failure probability was done. The detailed reliability analysis is carried out by using the second order reliability method (SORM) for the basic random variables with different prob-abilistic density within a nonlinear limit state function. The latter is based on the limit analysis of the failure pressure model for different standards and the numerical analysis using the finite element method and ANSYS software.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "Engineering Failure Analysis",
title = "Probabilistic analysis of corroded pipeline under localized corrosion defects based on the intelligent inspection tool",
volume = "115",
doi = "10.1016/j.engfailanal.2020.104683"
}

Zelmati, D., Bouledroua, O., Hafsi, Z.,& Đukić, M.. (2020). Probabilistic analysis of corroded pipeline under localized corrosion defects based on the intelligent inspection tool. in Engineering Failure Analysis
Pergamon-Elsevier Science Ltd, Oxford., 115.
https://doi.org/10.1016/j.engfailanal.2020.104683

Zelmati D, Bouledroua O, Hafsi Z, Đukić M. Probabilistic analysis of corroded pipeline under localized corrosion defects based on the intelligent inspection tool. in Engineering Failure Analysis. 2020;115.
doi:10.1016/j.engfailanal.2020.104683 .

Zelmati, Djamel, Bouledroua, Omar, Hafsi, Zahreddine, Đukić, Miloš, "Probabilistic analysis of corroded pipeline under localized corrosion defects based on the intelligent inspection tool" in Engineering Failure Analysis, 115 (2020),
https://doi.org/10.1016/j.engfailanal.2020.104683 . .

TY  - JOUR
AU  - Bouledroua, Omar
AU  - Hafsi, Zahreddine
AU  - Đukić, Miloš
AU  - Elaoud, Sami
PY  - 2020
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3383
AB  - We are reporting in this study the hydrogen permeation in the lattice structure of a steel pipeline designed for natural gas transportation by investigating the influence of blending gaseous hydrogen into natural gas flow and resulted internal pressure values on the structural integrity of cracked pipes. The presence of cracks may provoke pipeline failure and hydrogen leakage. The auto-ignition of hydrogen leaks, although been small, leads to a flame difficult to be seen. The latter makes such a phenomenon extremely dangerous as explosions became very likely to happen. In this paper, a reliable method is presented that can be used to predict the acceptable defect in order to reduce risks caused by pipe failure due to hydrogen embrittlement. The presented model takes into account the synergistic effects of transient gas flow conditions in pipelines and hydrogen embrittlement of steel material due to pressurized hydrogen gas permeation. It is found that blending hydrogen gas into natural gas pipelines increases the internal load on the pipeline walls due to overpressure values that may be reached in a transient gas flow regime. Also, the interaction between transient hydrogen gas flow and embrittlement of API 5L X52 steel pipeline was investigated using Failure Assessment Diagram (FAD) and the results have shown that transient flow enhances pipeline failure due to hydrogen permeation. It was shown that hydrogen embrittlement of steel pipelines in contact with the hydrogen environment, together with the transient gas flow and significantly increased transient pressure values, also increases the probability of failure of a cracked pipeline. Such a situation threatens the integrity of high stress pipelines, especially under the real working conditions of hydrogen gas transportation.
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - International Journal of Hydrogen Energy
T1  - The synergistic effects of hydrogen embrittlement and transient gas flow conditions on integrity assessment of a precracked steel pipeline
EP  - 18020
IS  - 35
SP  - 18010
VL  - 45
DO  - 10.1016/j.ijhydene.2020.04.262
ER  - 

@article{
author = "Bouledroua, Omar and Hafsi, Zahreddine and Đukić, Miloš and Elaoud, Sami",
year = "2020",
abstract = "We are reporting in this study the hydrogen permeation in the lattice structure of a steel pipeline designed for natural gas transportation by investigating the influence of blending gaseous hydrogen into natural gas flow and resulted internal pressure values on the structural integrity of cracked pipes. The presence of cracks may provoke pipeline failure and hydrogen leakage. The auto-ignition of hydrogen leaks, although been small, leads to a flame difficult to be seen. The latter makes such a phenomenon extremely dangerous as explosions became very likely to happen. In this paper, a reliable method is presented that can be used to predict the acceptable defect in order to reduce risks caused by pipe failure due to hydrogen embrittlement. The presented model takes into account the synergistic effects of transient gas flow conditions in pipelines and hydrogen embrittlement of steel material due to pressurized hydrogen gas permeation. It is found that blending hydrogen gas into natural gas pipelines increases the internal load on the pipeline walls due to overpressure values that may be reached in a transient gas flow regime. Also, the interaction between transient hydrogen gas flow and embrittlement of API 5L X52 steel pipeline was investigated using Failure Assessment Diagram (FAD) and the results have shown that transient flow enhances pipeline failure due to hydrogen permeation. It was shown that hydrogen embrittlement of steel pipelines in contact with the hydrogen environment, together with the transient gas flow and significantly increased transient pressure values, also increases the probability of failure of a cracked pipeline. Such a situation threatens the integrity of high stress pipelines, especially under the real working conditions of hydrogen gas transportation.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "International Journal of Hydrogen Energy",
title = "The synergistic effects of hydrogen embrittlement and transient gas flow conditions on integrity assessment of a precracked steel pipeline",
pages = "18020-18010",
number = "35",
volume = "45",
doi = "10.1016/j.ijhydene.2020.04.262"
}

Bouledroua, O., Hafsi, Z., Đukić, M.,& Elaoud, S.. (2020). The synergistic effects of hydrogen embrittlement and transient gas flow conditions on integrity assessment of a precracked steel pipeline. in International Journal of Hydrogen Energy
Pergamon-Elsevier Science Ltd, Oxford., 45(35), 18010-18020.
https://doi.org/10.1016/j.ijhydene.2020.04.262

Bouledroua O, Hafsi Z, Đukić M, Elaoud S. The synergistic effects of hydrogen embrittlement and transient gas flow conditions on integrity assessment of a precracked steel pipeline. in International Journal of Hydrogen Energy. 2020;45(35):18010-18020.
doi:10.1016/j.ijhydene.2020.04.262 .

Bouledroua, Omar, Hafsi, Zahreddine, Đukić, Miloš, Elaoud, Sami, "The synergistic effects of hydrogen embrittlement and transient gas flow conditions on integrity assessment of a precracked steel pipeline" in International Journal of Hydrogen Energy, 45, no. 35 (2020):18010-18020,
https://doi.org/10.1016/j.ijhydene.2020.04.262 . .

TY  - JOUR
AU  - Maslarević, Aleksandar
AU  - Bakić, Gordana
AU  - Đukić, Miloš
AU  - Rajičić, Bratislav
AU  - Maksimović, Vesna
AU  - Pavkov, Vladimir
PY  - 2020
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3336
AB  - In this study, two erosion protection MMC coatings with WC particles were deposited by the plasma transferred arc (PTA) welding. One of the coatings with tungsten carbide WC in the NiBSi matrix (WC/NiBSi), and the second coating WC in NiCrBSi matrix (WC/NiCrBSi) was deposited by the flame spray process on the same substrate material S235JR steel. Experiments were performed using a gas blast sand erosion test facility with high-velocity erodent particles impact (approximately 100 m/s) at different particle impact angles (20 degrees-45 degrees), with an objective to study erosion wear characteristics and mass loss of two MMC coatings. Microstructural characterization of MMC coatings was done by scanning electron microscope equipped with energy-dispersive X-ray spectroscopy, whereas X-ray diffraction analysis was used for identification of present phases. The hardness of coatings was determined by Vickers hardness measurements. WC/NiBSi obtained by the PTA process shows superior hardness and erosion properties.
PB  - Springer India, New Delhi
T2  - Transactions of The Indian Institute of Metals
T1  - Microstructure and Wear Behavior of MMC Coatings Deposited by Plasma Transferred Arc Welding and Thermal Flame Spraying Processes
EP  - 271
IS  - 1
SP  - 259
VL  - 73
DO  - 10.1007/s12666-019-01831-9
ER  - 

@article{
author = "Maslarević, Aleksandar and Bakić, Gordana and Đukić, Miloš and Rajičić, Bratislav and Maksimović, Vesna and Pavkov, Vladimir",
year = "2020",
abstract = "In this study, two erosion protection MMC coatings with WC particles were deposited by the plasma transferred arc (PTA) welding. One of the coatings with tungsten carbide WC in the NiBSi matrix (WC/NiBSi), and the second coating WC in NiCrBSi matrix (WC/NiCrBSi) was deposited by the flame spray process on the same substrate material S235JR steel. Experiments were performed using a gas blast sand erosion test facility with high-velocity erodent particles impact (approximately 100 m/s) at different particle impact angles (20 degrees-45 degrees), with an objective to study erosion wear characteristics and mass loss of two MMC coatings. Microstructural characterization of MMC coatings was done by scanning electron microscope equipped with energy-dispersive X-ray spectroscopy, whereas X-ray diffraction analysis was used for identification of present phases. The hardness of coatings was determined by Vickers hardness measurements. WC/NiBSi obtained by the PTA process shows superior hardness and erosion properties.",
publisher = "Springer India, New Delhi",
journal = "Transactions of The Indian Institute of Metals",
title = "Microstructure and Wear Behavior of MMC Coatings Deposited by Plasma Transferred Arc Welding and Thermal Flame Spraying Processes",
pages = "271-259",
number = "1",
volume = "73",
doi = "10.1007/s12666-019-01831-9"
}

Maslarević, A., Bakić, G., Đukić, M., Rajičić, B., Maksimović, V.,& Pavkov, V.. (2020). Microstructure and Wear Behavior of MMC Coatings Deposited by Plasma Transferred Arc Welding and Thermal Flame Spraying Processes. in Transactions of The Indian Institute of Metals
Springer India, New Delhi., 73(1), 259-271.
https://doi.org/10.1007/s12666-019-01831-9

Maslarević A, Bakić G, Đukić M, Rajičić B, Maksimović V, Pavkov V. Microstructure and Wear Behavior of MMC Coatings Deposited by Plasma Transferred Arc Welding and Thermal Flame Spraying Processes. in Transactions of The Indian Institute of Metals. 2020;73(1):259-271.
doi:10.1007/s12666-019-01831-9 .

Maslarević, Aleksandar, Bakić, Gordana, Đukić, Miloš, Rajičić, Bratislav, Maksimović, Vesna, Pavkov, Vladimir, "Microstructure and Wear Behavior of MMC Coatings Deposited by Plasma Transferred Arc Welding and Thermal Flame Spraying Processes" in Transactions of The Indian Institute of Metals, 73, no. 1 (2020):259-271,
https://doi.org/10.1007/s12666-019-01831-9 . .

TY  - CONF
AU  - Pavkov, Vladimir
AU  - Bakić, Gordana
AU  - Maksimović, Vesna
AU  - Matović, Branko
AU  - Đukić, Miloš
PY  - 2019
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/5029
PB  - Belgrade : Singidunum University
C3  - 6th International Scientific Conference on Information Technology and Data Related Research - Sinteza 2019
T1  - Rendgenska difraktometrija praha - XRPD
UR  - https://hdl.handle.net/21.15107/rcub_machinery_5029
ER  - 

@conference{
author = "Pavkov, Vladimir and Bakić, Gordana and Maksimović, Vesna and Matović, Branko and Đukić, Miloš",
year = "2019",
publisher = "Belgrade : Singidunum University",
journal = "6th International Scientific Conference on Information Technology and Data Related Research - Sinteza 2019",
title = "Rendgenska difraktometrija praha - XRPD",
url = "https://hdl.handle.net/21.15107/rcub_machinery_5029"
}

Pavkov, V., Bakić, G., Maksimović, V., Matović, B.,& Đukić, M.. (2019). Rendgenska difraktometrija praha - XRPD. in 6th International Scientific Conference on Information Technology and Data Related Research - Sinteza 2019
Belgrade : Singidunum University..
https://hdl.handle.net/21.15107/rcub_machinery_5029

Pavkov V, Bakić G, Maksimović V, Matović B, Đukić M. Rendgenska difraktometrija praha - XRPD. in 6th International Scientific Conference on Information Technology and Data Related Research - Sinteza 2019. 2019;.
https://hdl.handle.net/21.15107/rcub_machinery_5029 .

Pavkov, Vladimir, Bakić, Gordana, Maksimović, Vesna, Matović, Branko, Đukić, Miloš, "Rendgenska difraktometrija praha - XRPD" in 6th International Scientific Conference on Information Technology and Data Related Research - Sinteza 2019 (2019),
https://hdl.handle.net/21.15107/rcub_machinery_5029 .